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Where Confidence Comes From — The Depth of Preparation and Thought

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Introduction — A Trembling Hand and a Steady One

I clearly remember two interview days. Once my hand trembled, once it did not. The two interviews were of similar difficulty, and my skill had not changed much in between. The only difference was one thing: the depth of preparation.

On the day my hand was steady, I had pondered that company and that role more deeply than anyone. I had organized likely questions, I could explain my experience in terms of that role, and above all I had a strange conviction that "not many people have thought about this problem as much as I have." That conviction stopped the trembling.

Where does confidence come from? People often say "have confidence," yet rarely tell you where it actually comes from. This essay is an attempt to trace the root of confidence. To say the conclusion up front: real confidence is not mind control but a product that grows from the depth of preparation and thought.

Fake Confidence and Real Confidence

First we must distinguish the two. There are two kinds of confidence.

Fake confidence is inflated without grounds. You chant "I can do it" like a mantra, but skill and preparation don't back it up. Such confidence collapses at the first obstacle. The moment it meets the resistance of reality, the bubble bursts.

Real confidence has grounds. It arises when you have prepared enough, thought deeply, and actually have the experience of having done it. Such confidence may shake but does not collapse, because grounds hold it up.

Psychologist Albert Bandura's theory of self-efficacy explains this difference well. According to him, the most powerful source of the belief "I can do it" is not self-suggestion but actual success experience, that is, mastery experience. The experience of actually pulling something off even once gives far firmer confidence than confidence chanted in words.

So when someone asks me "how do I build confidence," I answer: "Don't try to build confidence; stack up the grounds for it." Once the grounds accumulate, confidence follows.

Rising Early — Taking the Reins of the Day

As the first habit for stacking the grounds of confidence, I point to rising early. I'm not trying to deliver a grand ode to the miracle morning. In fact I'm someone who focuses better at night, so forced pre-dawn rising didn't always fit me.

But what's clear is the difference between starting the day as if chased and starting it with room to spare. A day where you wake to an alarm, scramble to get ready, and rush out loses the reins from the start. Conversely, a day where you rise a little early, drink a cup of tea, and organize today's tasks begins with the sense that you are driving the day.

This sense of holding the reins is the seed of small confidence. The experience that you controlled the start of the day leads to a larger belief: "I can control my life to some degree." Self-control and self-efficacy reinforce each other.

What matters is not the time itself but consistency. Whether five or seven, rising consistently at a time that fits your body rhythm is better than forcing it earlier. Sleep research says a consistent wake time is important for sleep quality and daytime condition. You stabilize first the condition that is the foundation of confidence.

Not Breaking the Thread of Thought While Walking

The second habit is walking. More precisely, thinking while walking.

When I have a problem that won't unravel, I get up and walk. Answers that wouldn't come no matter how I wrung my brain at the desk often surface during a loop around the park. This isn't just my own anecdote. A Stanford study reported that walking meaningfully improves creative thinking — that divergent thinking is more active while walking than while seated.

Nietzsche said "all truly great thoughts are conceived while walking," and Aristotle's school was called the Peripatetic school because they discussed while strolling. The tradition of thinking while walking is old.

But what I want to emphasize is not the one-off stroll but not breaking the thread of thought. Keeping one problem in a corner of your mind and turning it over across days and weeks. Not letting go of it on the commute, in the shower, while walking. When such continuous thought accumulates, at some point you find yourself deeper into that subject than anyone.

And that very depth is the true source of confidence.

How Exercise Affects Confidence

In a story about confidence, the body cannot be left out. I play table tennis and run when I can, and my confidence in periods when I exercised consistently was distinctly different from periods when I didn't. This isn't merely a matter of mood.

The relationship between exercise and mental health is a relatively well-studied area. Many studies show regular exercise helps ease anxiety and depressive symptoms (though this does not replace medical treatment; if you face serious difficulties, seek a professional's help). Exercise regulates stress hormones, improves sleep quality, and provides a small daily sense of accomplishment: "I did something hard."

That last part connects directly to confidence. The experience of completing the exercise you set in the morning plants the self-perception, for that day, that "I'm a person who executes what I resolve." When experiences of keeping small promises to yourself accumulate, you come to trust yourself. Self-trust is another name for confidence.

The body's posture also affects the mind. Everyone knows from experience that simply straightening the shoulders and standing tall shifts the mood. Some research on posture and psychology is debatable, but that posture influences how we feel about ourselves in some way is intuitively acceptable. A confident heart rarely comes from a slumped posture.

So when my confidence drops, the first thing I do is move my body. Before straining to lift confidence with my head, I first walk, run, and straighten up. The body lifts the mind more often than the mind lifts the body.

The Conviction "No One Has Pondered This More Than I Have"

There are moments when words carry weight. Not because the voice is loud, but when deep thought stands behind the words.

When I recall the moments I could speak most confidently, there is one common feature: the conviction that "not many people have pondered this problem as long and deep as I have." This conviction is not arrogance. It is a legitimate ground that only someone who has gripped the problem for days and weeks can hold.

This is a confidence anyone can have. You can't be the best in every field in the world, but in the small area you handle, in the specific problem you're assigned, you can dig deeper than anyone. The conviction made by that depth lends weight to your words.

I think the secret of good speakers lies here too. Diction and gestures are the surface. Real persuasiveness comes from the feeling "this person really knows this deeply." And that feeling cannot be acted. It only leaks out when you actually know deeply.

So if you want to build confidence, don't learn to act confident — accumulate the experience of knowing something deeper than anyone. Depth is confidence.

How Comparison Erodes Confidence

What topples confidence fastest is not failure but comparison. In the SNS era especially, we endlessly compare others' most shining moments with our own most shabby ones. It amounts to comparing others' highlight reel with our own behind-the-scenes footage. No one can win that comparison.

According to psychologist Leon Festinger's social comparison theory, people instinctively evaluate themselves by comparing with others. You cannot eliminate this comparison entirely. But you can adjust its direction.

  • Upward comparison (with someone better than you) can be motivating or crushing. It becomes motivating when you see that person not as an "insurmountable wall" but as "an example of a path I can take."
  • The healthiest comparison is not with others but with your past self. "Is today's me a little better than yesterday's me?" Only this comparison is entirely within my control.

When my confidence wavers, I consciously change the target of comparison. I recall not others but myself a year ago. Then, usually, I see what has improved — slowly but clearly. That small evidence of growth restores confidence.

Comparison with others isn't wholly meaningless. Reasonable benchmarking is a starting point for learning. But when comparison leads to the conclusion "I, who can't do as well as that person, am worthless," that is not learning but self-destruction. You need to practice taking the information from comparison while separating the judgment of self-worth.

Metacognition — The Power to Know Yourself Accurately

Real confidence needs one more thing: the ability to know yourself accurately, that is, metacognition.

Metacognition is the ability to know "what I know and what I don't." Why does this relate to confidence? Because if you know yourself accurately, you can be assured in areas with grounds and humble in areas you don't know. This discernment is the core of unshakable confidence.

What's interesting is that the less capable a person, the more they tend to overestimate themselves, and the more capable, the more they tend to underestimate themselves. This is called the Dunning-Kruger effect. Ignorance hides ignorance. If you don't even know that you don't know, you easily fall into dangerous fake confidence.

There are practical ways to build metacognition.

  • When you think you know something, try explaining it to someone. The point where you get stuck is what you really don't know.
  • Before making a decision, deliberately consider "if I'm wrong, what would the reason be."
  • After a task ends, record the gap between expectation and result. This gap is the correction factor for your self-awareness.

The first one, trying to explain, is especially powerful. It is the principle of "learning by teaching" in education, and the core of the study method Richard Feynman was known to favor. When you try to explain, whether you really know is laid bare.

The Triangle of Preparation, Skill, and Metacognition

Let us tie the story so far into one. Real confidence is a triangle that three things create together.

FactorRoleWhen absent
PreparationMakes variables predictableYou scramble when it hits
SkillLets you actually do itThe bubble bursts
MetacognitionDiscerns how far you knowYou overestimate or underestimate

If even one of the three is missing, confidence is incomplete. Preparation without skill collapses on the real stage; skill without metacognition makes dangerous choices unaware of its limits; metacognition without preparation falls into the underestimation of "I won't make it."

Only when the three are together does it become confidence that shakes but does not collapse.

Confidence Is Contagious — Confidence Within Relationships

So far I've treated confidence as an individual's inner work, but confidence also grows within relationships. We don't grow in a vacuum.

Psychology has a concept called the Pygmalion effect: others' expectations influence actual performance. When someone believes in me, I actually do better. Conversely, when constantly doubted, even the skill you have becomes hard to express.

This gives two practical implications.

First, stay near people who believe in you. It's hard to build confidence among people who mock every attempt. An environment with people who recognize and cheer your small growth is the soil of confidence.

Second, be that person for someone else. Recognizing a colleague's small achievement and believing in their potential. This isn't merely kindness; it is an act that actually grows that person's confidence. And interestingly, the person who lifts others' confidence grows their own along with it.

I experienced this working at LINE. There was a senior who took my small attempts seriously, and that person's trust formed a large part of my confidence. Confidence seems like something you build alone, but in truth we build each other's confidence.

The Traps of Fake Confidence

For balance, let me note the traps where confidence drifts in the wrong direction.

Trap 1: Relying Only on Self-Suggestion

Chant "I can do it" a hundred times, but without grounds it is mere self-hypnosis. This doesn't mean positive thinking is meaningless, but that it alone is not enough. Gabriele Oettingen's research points out that vague positive fantasizing can actually lower the energy to act. Her proposed alternative is to combine positive imagining with facing obstacles (the WOOP technique). A realistic plan beats vague confidence.

Trap 2: Confusing Confidence with Arrogance

Confidence is "I can do this"; arrogance is "I can't be wrong." Confidence is open, arrogance is closed. A truly confident person can admit the possibility of their own mistake. If anything, the less confident a person, the more easily they turn defensively arrogant.

Trap 3: Depending Only on Others' Approval

If you draw confidence only from others' praise, the moment that praise disappears, so does the confidence. External evaluation is highly volatile. Sustainable confidence must come not from external approval but from the internal grounds of your own preparation and thought.

Trap 4: Making One Failure Your Identity

If you conclude "I'm a person who can't do it" when you fail, that single time topples your whole confidence. Failure is an event, not an identity. This distinction is the core of resilience.

Resilience — The Power to Stand Again After Falling

In a story about confidence, resilience cannot be left out. No matter how much you prepare, failure comes. A truly confident person is not one who doesn't fail but one who stands again after failing.

Psychologist Martin Seligman points to explanatory style as the core of resilience. Facing the same failure, the person who interprets it as "this is temporary, limited to a specific situation, and not all of me" rises again. Conversely, the person who interprets it as "this is permanent, applies to everything, and is a problem with who I am" stays down.

There are small practices for handling failure.

  • Separate the failure from the self. Not "I'm a failure" but "this attempt failed."
  • Extract one concrete lesson from the failure and apply it to the next attempt.
  • Allow time for recovery. Not being able to stand right after falling is normal.

When resilience accumulates, the character of confidence changes. From the fragile confidence of "I won't fail" to the firm confidence of "even if I fail, I'll stand again." The latter is far stronger, because it does not shake even while admitting the possibility of failure.

Rising Early, Thinking, and Recording

I treated rising early and walking separately earlier, but there's a third element that ties the two together: recording.

Thoughts are volatile. A good insight that surfaced while walking usually vanishes within an hour if unrecorded. So I try to build the habit of jotting down a thought even briefly. A phone memo or a small notebook, it doesn't matter.

How does recording connect to confidence? Three ways.

First, recording deepens thinking. Even a thought vaguely circling in your head becomes precise when you try to write it. The act of writing is itself a tool for organizing thought. That's why people say "writing is thinking."

Second, recording leaves evidence of growth. Looking at records from a month or a year ago shows how much you've grown. This evidence restores confidence shaken by comparison.

Third, recording keeps you from repeating the same deliberation. What you once thought deeply and wrote down, you needn't ponder from scratch next time. As accumulated thought stacks up, you become someone deeper in that field than anyone.

My day flows roughly like this:

  • Morning: rise at a consistent time and start by organizing the day.
  • Daytime: hold an unsolved problem in mind and turn it over during walks.
  • When it surfaces: jot it down, even briefly.
  • Evening: record the day's thoughts and what I accomplished.

When this simple flow repeats daily, the depth of thought and the grounds of confidence accumulate at once. It's not a grand method. Rise early, think while walking, and write. The steady repetition of these three builds the foundation of confidence.

Big Confidence and Small Confidence

Rather than seeing confidence as one thing, dividing it into two kinds makes it easier to handle.

Big confidence is the belief about life as a whole: "I can live my life well." This doesn't arise overnight; it forms as small successes stack up over a long time.

Small confidence is the belief about a specific task: "I can do this task." This can be built relatively quickly through preparation and practice for that task.

What's interesting is that small confidence accumulates into big confidence. As small successes pile up — "I pulled off this talk," "I solved this problem," "I wrapped up this conversation well" — before you know it, the big confidence of "I'm generally someone who gets things done" forms.

So when you feel short of big confidence, don't try vaguely to build big confidence. Instead, focus on doing one small task in front of you well. Stack the brick of a small success each day, and one day those bricks will have become a house called big confidence.

A Practice Routine to Build Confidence

Finally, let me organize the story so far into a daily routine.

Daily

  • Rise at a consistent time and start with the reins of the day.
  • Hold one unsolved problem in mind and turn it over during walks.
  • Before sleep, record one small thing you accomplished today (banking mastery experience).

Weekly

  • Pick one subject and dig into it deeper than anyone.
  • Explain what you learned to someone, or write it up (a metacognition check).
  • Review the gap between the week's expectations and results.

Before Something Big

  • Organize likely questions and scenarios (preparation).
  • Simulate it all the way through in your head once.
  • Check whether you've dug in enough to say "not many people have pondered this problem as much as I have."

The core of this routine is that it does not try to build confidence directly. Instead it stacks the grounds — preparation, thought, metacognition, resilience. Once the grounds accumulate, confidence follows on its own.

The Two Faces of Confidence — On Stage and Backstage

Confidence has two kinds of scenes: the confidence displayed on stage, and the confidence accumulated backstage. We usually see only the stage — the person presenting with assurance, the one answering an interview without a hitch. But that confidence was made in the unseen time backstage.

Understand this and your attitude toward confidence changes. Don't try to suddenly squeeze out confidence on stage. That's nearly impossible. Instead, invest in the backstage time — the time of preparing, practicing, and thinking. Confidence on stage follows naturally as a result of that time.

It's the same as athletes saying "the match is already decided in the practice gym." The composure of the decisive moment isn't made in that moment. It's made in the months of training before it. Confidence is the same.

So when you feel short of confidence, resolving "I should have more confidence" is almost never effective. That's an attempt to squeeze out, on stage, something that isn't there. Instead, go back to the backstage. Ask what more you can prepare, what you can know more deeply. Confidence is a product of accumulation, not of resolve.

Frequently Asked Questions

I prepared a lot but still tremble when it comes.

Nervousness and lack of confidence are different. Even a well-prepared person trembles. Trembling before something important is a natural bodily reaction, and moderate tension actually aids performance. The key is not to eliminate the trembling but to pull off what you prepared even amid it. "I'm trembling but I'm prepared" is a healthy state.

I don't have time to dig deep.

Depth is more a matter of continuity than of the absolute amount of time. Even 30 minutes a day, carried over a subject for weeks and months, reaches surprising depth. "Not breaking the thread of thought," mentioned earlier, is the key. If you don't let go of the subject on the commute, while walking, in the shower, depth accumulates even with little actual desk time.

I can't be confident in every field, can I?

Right, and you don't need to be. As said in the metacognition section, confidence is a state where assurance in "areas I know well" and humility in "areas I don't" coexist. A person confident about everything is, if anything, dangerous. Know your area and deepen within it.

Even if it's fake confidence, doesn't acting it help?

Short term, it can. "Acting as if you can" sometimes draws out actual action. But this is only a temporary bridge, not a foundation. Even if you start by acting, you must ultimately make that act real through actual preparation and skill for it to last. Repeat only the act and it gets exposed, returning as greater anxiety.

Aren't confidence and humility contradictory?

Not at all. They go together. A truly confident person has enough room to admit their limits. They have no fear in saying they don't know what they don't know. Confidence that can't be humble is often not confidence but a shield for anxiety.

Prescriptions for Restoring Confidence by Situation

The moment confidence collapses comes suddenly. At such times, rather than vaguely resolving to "cheer up," a concrete prescription that fits the situation is more effective. Here are the situational prescriptions I use.

Right After a Big Failure

  • Name the failure as an event. "This attempt didn't work," not "I'm someone who can't do it."
  • Just grieve for 24 hours. Don't rush to find a lesson.
  • The next day, write down one thing to learn from this failure.
  • Deliberately create one small success (even a very easy task) to recover the feel.

When You Shrink From Comparison With Others

  • Switch the target of comparison from others to yourself a year ago.
  • Check whether you're comparing their highlight with your behind-the-scenes.
  • Take the information (method, path) from that person but separate the judgment of self-worth.

When You Tremble Before Something Important

  • Don't try to eliminate the trembling; focus on the fact that "I'm prepared."
  • Move your body first (deep breathing, a short walk, straightening up).
  • Concretize the worst-case scenario and confirm that even then it's okay.
  • Recall "not many people have pondered this problem as much as I have."

When Confidence Is Chronically Low

  • Build the habit of recording one small thing you accomplished each day (banking evidence).
  • Increase time with people who believe in you.
  • Check the basics first, like exercise and sleep.
  • Pick one area and steadily build depth.

Do you see what these prescriptions share? Without denying the emotion, they rebuild small grounds through action. Confidence is not restored by resolve. It's restored by the evidence of small actions.

Common Misconceptions About Confidence

Finally, I want to correct a few common misconceptions about confidence. These misconceptions often hinder confidence themselves.

Misconception 1: Confidence Is an Inborn Personality

An extroverted, loud person can look confident, but that's personality, not confidence. A quiet person can have deep confidence, and an extroverted person can be anxious inside. Confidence is not temperament but a product of preparation and thought. Therefore anyone can build it.

Misconception 2: If You're Confident You Don't Tremble

As said, even a well-prepared person trembles. Trembling is not the absence of confidence but evidence that you take the task seriously. Real confidence is not the lack of trembling but the ability to pull it off amid the trembling.

Misconception 3: Confidence Arises Only When Results Are Good

Results can't be controlled. Stake confidence only on results, and confidence sways with luck. Sustainable confidence comes not from results but from the process. The process confidence of "I've done what I could" is firm regardless of the result.

Misconception 4: Once You Get Confidence It Stays

Confidence is like a muscle. Don't use it and it weakens; use it steadily and it strengthens. Gaining confidence once doesn't mean it lasts forever. Stop preparing, thinking, and banking small successes, and confidence slowly drains too. So confidence is a habit, not a result.

Misconception 5: Confident People Don't Ask for Help

The opposite, if anything. A truly confident person has no qualms about admitting what they don't know and asking for help. Being unable to ask for help isn't confidence but a heart afraid of looking weak. Confidence comes from the room to admit vulnerability.

Seven Habits That Erode Confidence

As much as knowing how to build confidence, avoiding the habits that topple it matters too. These are habits that, repeated unthinkingly, slowly erode confidence.

  • Endless SNS comparison: comparing others' highlights with your daily life and putting yourself down.
  • Breaking promises to yourself: repeating "I'll start tomorrow" and losing self-trust.
  • Procrastinating everything: as delayed tasks pile up, the self-perception "I'm someone who can't do it" hardens.
  • Perfectionism: treating anything less than 100% as failure and not acknowledging small achievements.
  • Negative self-talk: ceaselessly criticizing yourself in your head.
  • Obsessing only over results: staking confidence on uncontrollable results, so you're always anxious.
  • Not asking for help: struggling alone for fear of looking weak, and collapsing further.

What these habits share is that they all erode the grounds of confidence (preparation, small successes, self-trust). If even one applies to you, try turning its opposite into a small practice.

  • Instead of SNS comparison, compare with yourself a year ago.
  • Set one small promise to yourself and keep it without fail.
  • Finish today the smallest of the tasks you've been delaying.
  • Allow yourself to consider 80% enough.
  • Notice negative self-talk and change it to "I've done what I could."
  • Focus on the process instead of the result.
  • When stuck, summon the courage to ask for help.

Start by changing one habit. Turn one habit that eroded confidence into a habit that builds it. That small switch makes a big difference over time.

Why Confidence and Humility Go Together

Finally, I want to touch once more on the relationship between confidence and humility. Many think of the two as opposites, but real deep confidence goes together with humility.

Think about it and it's obvious. A person who knows themselves accurately (high in metacognition) discerns what they know well and what they don't. They're assured in what they know (confidence) and admit what they don't (humility). The two come from the same root: accurate self-perception.

Conversely, look at someone who can't be humble, and they're often filled not with confidence but with anxiety. Afraid they'll collapse if they admit a weakness, they pretend to know what they don't and can't admit mistakes. This is an expression of weakness, not strength.

So I read the signs of real confidence this way:

  • Being able to say "I don't know" about what you don't know.
  • Being able to admit and apologize for your mistakes.
  • Being able to accept someone else's better opinion.
  • Having no qualms about asking for help.
  • Receiving criticism as information, not as an attack.

A person capable of all this has a deep steadiness — that their worth won't collapse from a single mistake or gap in knowledge. That is real confidence. Not bluster, but a firmness that shakes yet does not collapse.

Closing — To That Trembling Hand

Let us return to the interview room. If today's me could say one thing to that me whose hand trembled, it would be this: "You should have prepared more deeply. Confidence does not arise by resolving to have it; it grows from the depth of preparation and thought."

Confidence is not an inborn temperament. It is something you build. Rising early to hold the reins of the day, not breaking the thread of thought while walking, digging into one area deeper than anyone, knowing yourself accurately, and standing again even after falling — all of that process shapes the product called confidence.

So when you feel short of confidence, don't berate yourself. Instead, ask: "Have I prepared enough? Have I thought deeply enough?" When you can answer that question without shame, confidence will already be within you.

Let me gather the core of this essay one last time.

  • Confidence is not temperament but a product of preparation and thought.
  • Fake confidence has no grounds; real confidence has grounds.
  • Rise early to hold the reins of the day, and don't break the thread of thought while walking.
  • Record the thoughts that surface to stack depth and evidence of growth.
  • Dig into one area deeper than anyone to build "the power of speech."
  • Use metacognition to discern what you know from what you don't.
  • Switch the target of comparison from others to your past self.
  • Stack small confidence and grow it into big confidence.
  • Turn habits that erode confidence into habits that build it.
  • The resilience to stand again after falling is real confidence.
  • Real confidence goes together with humility.

Confidence isn't completed in one go. It grows little by little through daily small preparation and thought, and the banking of small successes. Doing one small task well today — that is the first step to stilling a trembling hand.

My hand still trembles before something important. But now I don't fear that trembling. It means the task matters as much as it trembles, and through preparation I know I can pull it off even amid the trembling. Confidence is not a state without trembling but the ability to move forward together with it.

When your hand trembles, don't treat the trembling as an enemy. Instead, quietly ask: "Have I prepared?" If the answer is yes, you are already a person with enough confidence.

Confidence is not far away. It is already growing within the small preparation you begin today, the thought you don't break off, and the depth of a single step.

References

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