Lately, I’ve been staying up far too late reading the Aubrey–Maturin series by Patrick O’Brian.

I tell myself I’ll stop after one chapter.
Then another ship appears on the horizon.
Another decision needs to be made.
Another thread is left hanging.

Before I know it, it’s 1am.

I’m currently deep into The Commodore, the seventeenth book in the series — with four still to come. And hovering over the whole thing is a strange, slightly melancholy fact: the twenty-first and final book was never finished. O’Brian died before he could complete it.

There is no ending.
There never will be.

And yet, the pull is irresistible.

Not because every chapter resolves neatly, but because so many of them don’t.

That urge to keep reading - to stay with something unfinished - isn’t a failure of self-control.

It’s how the brain works

💡 ONE IDEA WELL

That pull - the need to know what happens next - isn’t accidental.

In the 1920s, a young psychologist named Bluma Zeigarnik noticed something curious in a Viennese café.

Waiters could remember long, complicated orders with ease.
But once the food was served and the bill paid, the details evaporated.

Unfinished tasks stayed vivid.
Finished ones faded.

Zeigarnik showed that the brain treats incompletion as unfinished business. Attention stays active. Memory stays warm. The mind leans forward, waiting for resolution.

This became known as the Zeigarnik effect.

We don’t remember things because they’re polished.
We remember them because they’re still open.

🧰 LESS MESS, MORE MESSAGE

Most presentations are designed to be complete.

Every point explained.
Every case wrapped up immediately.
Every question answered the moment it’s asked.

It feels kind.
It feels clear.

But cognitively, it switches the lights off too early.

When everything is resolved straight away, the audience’s brain has nothing to hold onto. No tension. No anticipation. No reason to stay alert.

The paradox is this:

Great talks don’t spoon-feed answers.
They give the audience a problem their mind wants to keep working on.

That’s why a good story lingers.
And why a neat, exhaustive talk often doesn’t.

🛠️ TRY THIS

The next time you’re crafting a presentation, resist the urge to finish too quickly.

Try one small shift:

• Ask a question early and don’t answer it yet
• Introduce a case without revealing the outcome
• Name a tension (“This seems obvious… but it isn’t”) and let it sit
• Delay the conclusion by one slide longer than feels comfortable

You’re not withholding information.
You’re giving the audience something to think about.

If it feels slightly uncomfortable, you’re probably doing it right.

❓ ASK YOURSELF THIS

Where am I rushing to provide closure
and what might happen if I let the question breathe a little longer?

Patrick O’Brian never finished his final book.
Bluma Zeigarnik never set out to study presentations.

But they both stumbled onto the same truth:

The mind stays with what’s unfinished.

​
Speak soon,

Andy