MSS #0173: Why Your Brain Trusts Old Evidence More Than New Reality

MSS #0173: Why Your Brain Trusts Old Evidence More Than New Reality And The Impact That Has

2 May, 2026

🕒Read time: 4.2 minutes

🚀In a hurry? Cut straight to the heading “The 3-Step Identity Update” - reduced read time 2.4 minutes

Have you ever noticed this?

You handle something better than before…

You step up in a way you didn’t used to…

You do the very thing you once doubted…

And yet…

Your mind still says:

“That’s not really me.”

This is one of the most frustrating experiences for capable people.

Because on paper…

You’ve already changed.

But in your head…

You haven’t caught up yet.

Why This Happens

Your brain is not designed to keep you accurate.

It’s designed to keep you safe.

And it does that by relying on what it already knows works.

Old evidence.

Past experience.

Familiar patterns.

Think of it like this.

Your mind builds a “case file” on who you are.

• What you’re good at

• What you struggle with

• Where you fit

• Where you don’t

And once that file is built…

It doesn’t update easily.

Even when new evidence shows up.

The Hidden Bias You’re Up Against

Your brain gives more weight to old evidence than new.

Why?

Because old evidence feels:

Proven
Repeated
Safe

New evidence feels:

Uncertain
Temporary
Risky

So one confident presentation…

Doesn’t override
10 years of “I’m not great at speaking.”

One decisive moment…

Doesn’t override
Years of hesitation.

Your mind simply says:

“That was an exception.”

The Cost of This

You stay smaller than you are.

You hesitate when you could move.

You second-guess when you already know.

And this is where imposter syndrome quietly lives.

Not in your capability…

But in your outdated internal evidence file.

The 3-Step Identity Update

(2-minute version)

If you want to change how you show up…

You don’t need more confidence.

You need better evidence.

1. Capture It

Don’t rely on memory.

It’s biased.

When you do something well:

Write it down

Be specific

Capture what actually happened

Small wins count.

Because your brain ignores them by default.

2. Label It

This is where most people go wrong.

They say:

“That went well.”

And move on.

Instead say:

“That is evidence of who I am becoming.”

You are telling your brain:

This is not luck

This is not a one-off

This is me

3. Repeat It

Old evidence sticks because it’s repeated.

So, your new evidence needs the same.

Re-read it

Reflect on it

Mentally replay it

You are doing one thing:

Updating the file.

A Simple Way to Use This

At the end of each day…

Ask yourself one question:

“What did I do today that the old version of me wouldn’t have done?”

That’s it.

Because that’s where the shift is.

Not in massive breakthroughs.

But in small, repeated proof…

That you are no longer who you used to be.

So What?

Your mind is loyal.

But it’s loyal to the past.

If you don’t actively update it…

It will keep showing you an outdated version of yourself.

And you’ll keep trying to grow…

While being pulled back by old evidence.

Change that…

And everything starts to move faster.

A little science (kept simple)

Your brain is constantly predicting what’s happening now…

Based on what’s happened before.

That means:

Old experiences carry more weight

Because they’ve been repeated more often

On top of that:

Your brain looks for proof it’s already right

And quietly ignores what doesn’t fit

So even when you do something new…

Your mind often treats it as:

A one-off

An exception

Not who you are

The approach you’ve just learnt works because it does three things:

It captures new experiences before your brain forgets them

It gives them meaning so they count as identity

It repeats them so they start to stick

In simple terms:

You are training your brain to update its prediction of you.

And when that prediction changes…

So does how you think, decide and act.

If this resonated, reply and let me know:

What’s one piece of new evidence you’ve been ignoring?

See you next week. One more thought 👇

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That's it for this week. Thanks for reading, really hope this helped. Contact me if you think I can help you further at [email protected].

Happy thinking.