Doing Good Is Selfish (and That's a Good Thing)

Originally shared in Tuesday Notes on April 14, 2026.

Sunday was "Day of Good Deeds" and it got me thinking about something slightly uncomfortable:

What if being a "good person" is... actually selfish?

Not in a bad way. But in a biological, brain-wired kind of way.

Because here's what happens when you help someone:

Your brain releases dopamine (reward), oxytocin (connection), and lowers cortisol (stress).

So that warm, slightly glowing feeling after doing something kind? That's not random. That's your nervous system saying: yes, more of this.

There's even a term for it: "helper's high" (which in my opinion is more plausible than "runner's high" 😜)

And studies show that people who regularly help others report lower levels of depression, reduced stress, and a stronger sense of purpose, not because their lives are easier, but because their attention shifts.

But then there's something even more fascinating. Something I didn't expect when I went looking for the science. A long-term study followed over 30,000 adults for almost two decades. The people who regularly helped others outside their home didn't just feel better. Their brains aged differently.

Cognitive decline was around 15–20% slower!

That's not marginally slower. That's meaningfully slower. And the effect compounded over time, year after year of helping. The sweet spot? About two to four hours a week.

And it wasn't even about formal volunteering. Helping at an organisation counted. But so did helping a neighbour move a sofa. Dropping off groceries. Looking after someone who needed support.

I was reminded of this during a time in my own life when I volunteered with a refugee family from Afghanistan. They had three children, two of them deaf and mute. And what they needed most wasn't something grand or heroic. All they needed was help getting to and from the hospital for regular check-ups. So that's what I did.

But what stayed with me wasn't the "helping." It was how it felt.

I remember leaving those days with this quiet warmth in my chest and the biggest grin on my face. Not drained. Not depleted. Almost the opposite.

Like somehow... they had done something for me.

We didn't speak the same language. But we communicated in smiles, in laughter, in that very simple, very human kind of warmth. They were so kind. So open. And the children, just incredibly sweet and full of joy.

They hugged me. They fought over who got to hold my hand as we walked down the street.

And I remember thinking: this might be one of the best feelings there is.

Because when you're stuck in your own head, everything feels heavier. Problems loop. Thoughts spiral. Perspective shrinks.

Helping someone else interrupts that loop. It pulls you out of your internal world and shifts perspective. And something subtle happens there:

Your problems don't disappear. But they resize.

There's also something deeper. In psychology, we talk about eudaimonic wellbeing, the kind that comes from meaning, not just pleasure. Helping others taps directly into that. Not quick dopamine. But the quiet feeling of: this matters.

And no, this definitely doesn't mean overgiving, self-abandonment, or rescuing everyone. That's something else entirely. This is about intentional moments of contribution.

Small ones count.

A message. A check-in. Giving your time.

Not because you have to.

But because you choose to.

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Tuesday Brain Snack

The same study found that informal helping (a neighbour, a family member, a friend) provided cognitive benefits comparable to formal volunteering.

The brain doesn't distinguish between organised service and personal care so if you've never thought of yourself as "a volunteer," you may already be doing something that counts.

If you've been feeling stuck, low, or disconnected lately try this:

Find 2 hours this week to help someone.

Something small.

Something real.

And notice what shifts.