What Marks the Summit of a Life?

What ikigai and flow have in common?

👋 Hey, I’m Aruna. Surface Tension is my weekly exploration of insights and thought provoking quotes from the books I read, bundled into one idea worth sitting with. For more, browse my book notes and long form articles.

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The Story Phase

This week, I’ve been meddling with the concept of ikigai. In its most traditional sense, ikigai is what makes life worth living; not atomically, not for a quick moment, but something you can pursue for a lifetime. In that sense, it’s usually subtle, ordinary, and undramatic.

The problem is that finding your ikigai can be genuinely hard. Because ikigai isn’t something you think your way into.

Part of the difficulty is the timeframe. Ikigai stretches out toward “forever.” It’s the thing you could return to for decades, not just something that feels good on a random Tuesday.

But there’s a silver lining: if something really is “for you” in that deep way, it usually isn’t arbitrary. It tends to be lodged into your temperament, so engraved into your personality that you’re pulled toward it again and again, even when there’s no external reward.

So the question becomes: what tool can you use to detect that pull, while you’re still stuck inside a normal week?

Luckily, there is a tool for this. People call it flow.

I always come back to a quote from Jack London’s Call of the Wild that explains it perfectly:

“There is an ecstasy that marks the summit of life, and beyond which life cannot rise. And such is the paradox of living, this ecstasy comes when one is most alive, and it comes as a complete forgetfulness that one is alive.”

Flow, compared to ikigai, is different in scale. Flow is local and temporary: a few minutes where your attention locks in, time slips, and the narrator in your head goes silent. Ikigai, on the other hand, is global and long-term: the shape of a life, or at least the part of a life that keeps feeling worth living.

But that’s exactly why flow is useful. It’s not ikigai, but it’s concrete evidence for ikigai.

The Structure Phase

This can be better understood through a simple model: attention as currency.

‘Attention as currency’ carries an uncomfortable truth: you don’t “have” attention the way you have opinions. You just spend it. And like any scarce currency, it shows value in a way your self-description won’t.

Here’s how the model works:

• Attention is the real budget. Clocks track the time; attention is what you actually spend.

• Spending patterns are far more accurate than stated preferences. What you repeatedly give attention to is a more reliable signal to ‘what you really like‘ than what you say matters to you.

• Flow is a high-denomination spend. When you’re in flow, you’re not making a small purchase. You’re practically emptying the wallet, giving full allocation to whatever you’re doing, with minimal self-monitoring.

This is why flow is such a useful tool. It’s hard to fake sustained, voluntary attention. You can force yourself through tasks, you can rationalize choices, and you can adopt the right language. But you can’t easily counterfeit that clean, absorbed “yes” where attention stays without being dragged.

And that’s exactly how ikigai often looks in real life: as a pattern of spending. When you’ve found it, it gives steady returns. You give time to what you love, and that love stacks up over a lifetime.

Not a bad deal!

The Interface

Putting the two together: in Story, “complete forgetfulness that one is alive” is, in Structure, a full unselfconscious spend of attention.

Your attention is already voting for something. Flow is what it looks like when the vote is unanimous. Find what that is, and you’ve found something you’ll love doing for a lifetime, and that is, your ikigai.

A question worth sitting with: Even with so many things fighting for your attention, what’s the one small thing, even for just five minutes, where you find yourself completely absorbed, where time slips by without you even noticing?