You Think You Can Handle It.
But Where’s the Evidence?

Back in the 1980s, when I was working as an fire alarm electrician, we used to do some pretty dangerous shit.

One job in particular scared the hell out of me.

We had to drill into an energized copper bus bar to make a connection for a fire-alarm circuit.

If you’re not an electrician, imagine a thick piece of copper carrying power through a distribution system.

Those copper bars could carry something on the order of a thousand amps.

And I’d learned in apprenticeship school that even a small fraction of one amp passing through a human body can be fatal.

The current carried by equipment isn’t the same as current passing through a person.

But one mistake around that energized equipment could have killed me.

And there I was, drilling into it, sweating bullets.

I had training and experience. I believed I knew what I was doing. We completed the job, and I walked away.

At the time, that probably reinforced something I believed about myself — that I was a capable electrician, that I’d done difficult and dangerous things before, that I could do them again.

But looking back, I’ve come to see an important distinction.

Just because you’ve done something a hundred times doesn’t mean you were doing it safely.

And just because you believe you can do something doesn’t mean you’ve actually developed the capability.

That raises a question I’ve been chewing on lately.

What’s the real difference between confidence and arrogance?

Confidence Is Earned. Arrogance Is Assumed.

Here’s how I’ve come to think about it.

Confidence comes from evidence.

You’ve done something.

You’ve practiced it.

You’ve struggled with it, made mistakes, corrected them, and done it again.

Eventually you’ve performed the skill so many times that it becomes familiar — sometimes even boring.

That’s what earned confidence looks like.

You don’t have to announce how good you are, and you don’t need to prove yourself every time somebody questions you.

You know what you’re capable of because you’ve demonstrated it, over and over, under real conditions.

Arrogance is different.

Arrogance is believing you can do something without the evidence to back it up.

You haven’t put in the repetitions. You haven’t tested yourself. You haven’t been challenged hard enough to know whether the ability actually holds up. But you’re certain anyway.

That resembles the everyday idea people associate with Dunning–Kruger: certainty outstripping demonstrated competence.

The research is more nuanced, but you’ve probably met somebody who’s sure they can do the job before they’ve ever proved it.

Compare these two statements.

One is: “I think I could do that.”

The other is: “I’ve done that, or something close enough, enough times that I have real reason to believe I can do it.”

The first is a belief. The second is supported by evidence.

And evidence matters, because your own head is a lousy place to prove anything.

Everybody Has a Plan Until Reality Shows Up

There’s that Mike Tyson line about everybody having a plan until they get punched in the mouth.

I’ve always loved it.

Because people carry around all kinds of beliefs about themselves.

• I’m good under pressure.
• I’m a natural leader.
• I could defend myself if I had to.
• I know how to handle difficult people. I could run my own business.
• I could do that job.

Okay.

How do you know?

• What have you actually done that demonstrates it?
• Have you practiced it?
• Have you performed it when things weren’t going according to plan?
• Have you faced real resistance?

Or are you just imagining the version of yourself you’d like to be?

There’s no pressure or opposition in your imagination. You get to perform perfectly because you’re writing the scene.

Then reality shows up, and the plan stops working.

• The customer says no.
• Your employee pushes back on your decision.
• Your opponent doesn’t cooperate.
• The job turns out to be more complicated than you expected.

That’s when you find out what you can do.

Here’s the good news, though.

You don’t have to wait for life to punch you in the mouth before you find out.

That’s what practice is for.

The Difference Between Knowing and Doing

Over 35 years as an electrician, I made thousands of connections, tackled difficult installations, and solved problems that required training and experience.

After enough successful repetitions, you recognize what matters and notice when something isn’t right.

That’s earned confidence.

But something else can happen too.

You can get so comfortable with a task that you forget how dangerous it actually is.

You can start believing that because you’ve always gotten away with it, there’s no reason to question it.

And that’s where experience becomes a trap.

I know because I’ve been hurt.

During my electrical career I got shocked more times than I care to remember, and one night I got caught on an energized circuit and ended up being treated at a burn unit.

All that experience didn’t make me immune to getting hurt.

Some things I successfully performed weren’t things I should have been doing at all.

Being able to perform a task doesn’t automatically mean the way you performed it was safe.

Technically pulling it off and making a sound decision are two different things.

You can be competent at something and still lack the judgment to know when — or whether — to do it.

Confidence in your skills has to be paired with judgment about how to use them.

Otherwise what looks like confidence quietly turns into complacency.

The Quiet Confidence of Capability

I’ve always liked Theodore Roosevelt’s line:

You don’t need to brag or intimidate anybody.

Put in the work, handle hard situations, and let your capability speak for itself.

I’ve met electricians who were incredible craftsmen, and they never felt the need to spend the day telling you so.

You could see it in the work.

They knew how to approach a problem, what had to happen first, and how to adapt when something unexpected came up.

That quiet confidence matters beyond the trades: in leadership, relationships, business, and martial arts.

Familiar work can feel almost boring, but familiarity doesn’t give you permission to ignore risk.

Jiu-Jitsu Is a Pretty Good Bullshit Detector

These days I’m learning Brazilian jiu-jitsu, and one of the things I appreciate about it is how fast it exposes the gap between what you think you can do and what you can actually do.

I can watch a technique on YouTube.

I can understand the mechanics. I can practice it with a partner who’s cooperating. And I can feel pretty good about myself.

Then I try it against somebody who’s actively resisting, and the damn thing doesn’t work. My timing’s off. My weight’s in the wrong place. The opening I expected isn’t there. My partner isn’t following the script I had in my head.

That doesn’t mean the technique is bad, and it doesn’t necessarily mean I misunderstood it.

It might just mean I haven’t practiced enough, or that I can do it on one partner but not another, or slowly but not under pressure.

Maybe I need another hundred repetitions.

That’s the beauty of honest training.

It gives you evidence of what you can actually demonstrate — not what you imagine, not what you hope to develop someday, but what you can do right now.

And with practice, that capability grows. More reps. Adjustments. Different kinds of resistance. A deeper feel for what works, when it works, and why.

Eventually the difficult thing becomes familiar. You stop thinking through every movement and just do it. That’s earned confidence.

The interesting part is that the more you learn, the more you recognize what you don’t know yet. You get less interested in proving yourself and more interested in improving yourself.

What Are You Assuming About Yourself?

Now let’s turn this toward you.

What do you believe you’re good at?

Maybe you think you’re good under pressure. Maybe you believe you’re a natural leader, or that you can handle confrontation, or that you’d be able to defend yourself if it came to it.

Or maybe your assumptions run the other way.

You think you’re terrible at sales. You’re too old to learn something new. You’re not good with people. You could never run your own business.

How much of that belief is supported by evidence?

And how much is a story you’ve been telling yourself?

Suppose you’ve been supervising people for ten years, so you describe yourself as a good leader.

Ten years on the job is experience.

But what does the evidence say about your leadership?

• Do the people you supervise understand the work?
• Can they solve problems without you hovering over them?
• Have you helped anyone become more capable?

Maybe you’re excellent at keeping a crew productive but terrible at having an honest conversation with someone who’s struggling.

That’s not a verdict on your worth. It’s useful information about what to practice next.

Or maybe you’ve avoided asking for a raise because you assume you’re bad at negotiating.

How many times have you actually tried?

What preparation did you do?

One awkward conversation isn’t a lifetime diagnosis. It might simply be the first rep.

Because arrogance isn’t the only problem here.

Plenty of people underestimate themselves just as badly as others overestimate their abilities.

They convince themselves they can’t do something without ever really trying.

They avoid the discomfort of being a beginner, mistake being new for being incapable, and end up living inside limits they never tested.

The point isn’t to knock yourself down.

It’s to see yourself accurately enough to improve.

⚔ The Dojo Drill: Turn an Assumption Into Evidence

Don’t just nod and move on.

Do one thing.

Pick a belief about yourself that matters right now.

Something you think you’re good at, or something you believe you can’t do.

Then work through four steps.

Step 1: Write down the belief.

Finish this sentence: “I believe I can — or cannot — __ because __.”

Write what you actually believe, not what you think you’re supposed to believe.

Step 2: Identify your evidence.

Ask: what have I actually done that proves — or challenges — this belief?

Make two columns.

• On the left, “What I’ve demonstrated.”
• On the right, “What I’m assuming.”

On the left, list what you did, the results, and your mistakes.

On the right, write the conclusions you’ve drawn.

Say you think you’re terrible at sales. Maybe you’ve had three awkward conversations about money.

That’s evidence of three awkward conversations.

But does it prove you’re incapable of selling, or does it show you simply haven’t developed the skill and the comfort yet?

Those conclusions lead to very different actions.

Be careful not to cherry-pick your evidence. A few wins don’t erase your mistakes, and one mistake doesn’t erase years of capable work.

Look for patterns across repeated attempts, including the conditions that made success possible.

• What happened when the task was unfamiliar?
• When you were tired?
• When somebody pushed back?
• What did other people notice that you missed?

You don’t need perfect evidence.

You need a more accurate starting point than your own untested opinion.

Step 3: Get some repetitions.

Don’t just think about what you might be able to do.

Find a reasonable, safe way to practice it.

If it’s sales, rehearse explaining your offer and asking for payment, over and over, and get feedback.

If it’s hard conversations, practice stating your position calmly while listening to someone who disagrees.

If you think you’re too old to learn something new, spend fifteen minutes a day on an unfamiliar skill for a week.

If you think you’re a good leader, ask the people you’ve actually led for specific, honest feedback.

Make the test specific enough that you can tell whether you’re improving.

Instead of “get better at speaking,” try explaining one idea clearly to another person, then ask what they understood and what confused them.

Repeat the exercise after making a change.

Now you’re not just collecting opinions about yourself. You’re gathering evidence from practice.

The point isn’t to prove yourself right.

It’s to find out what you can do. When you make a mistake, treat it as information.

Step 4: Update your belief.

After you’ve practiced, ask: what can I now demonstrate that I couldn’t before?

Maybe you’re less capable than you imagined, or better than you feared. Maybe you succeed in some conditions but not others. Now you know what to practice.

The goal isn’t to inflate your confidence. It’s to earn confidence that matches your capability.

Test the assumption against reality.

One Rep Before Tomorrow

Don’t turn this into a fifty-item self-improvement project or a weekend of self-analysis.

Pick one belief. Identify the evidence. Find one safe chance to practice. Take one small action.

One rep.

Then another when you’re ready. Keep going until the difficult thing becomes familiar and you can demonstrate the skill, not just talk about it.

That’s confidence: not bravado, just the quiet knowledge that you’ve done the work.

Confidence Is Something You Build

When I think back to drilling that energized bus bar, I remember being afraid — and I had good reason to be.

We completed the job. But that didn’t automatically mean we’d made the right call.

I had the skills and the experience, but experience didn’t remove the danger, and finishing a dangerous task didn’t prove the risk was justified.

I understand that better now.

As an older BJJ blue belt, I’m learning that lesson again.

There’s always something I don’t know, something I haven’t practiced enough, something that fails when somebody resists.

It bothers me less now, because I know what to do.

Practice. Get feedback. Make corrections. Repeat until I can demonstrate the skill.

That’s the kind of confidence I want for you.

Confidence is knowing you can do something because you’ve done the work and demonstrated the capability. Arrogance is believing you can do it without the evidence to back it up.

And if you’re not sure which one you’ve got, don’t argue with yourself about it.

Go practice. Get some evidence.

And let your capabilities do the talking.

📚 Leader’s Library

​The Art of Learning — Josh Waitzkin​

Why?

Josh Waitzkin knows something about learning difficult skills.

As a young chess prodigy whose early life helped inspire Searching for Bobby Fischer, he developed an unusually deep understanding of competitive chess.

Later, he turned his attention to martial arts, becoming a world champion in Tai Chi Push Hands competition.

In The Art of Learning, Waitzkin explores what these seemingly different disciplines taught him about developing expertise.

P.S. Know a martial arts gym owner who’s stressed about money or student numbers?

Do them a favor: send them to The Leader's Dōjō, my website where I help owners get more students and keep them longer with simple systems.

One forward from you could change their gym: The Leader's Dōjō​

Chuck