Through Thick and Thin: What Loyalty Really Looks Like Over Time

Which is harder to stay for — someone’s crisis, or someone’s ordinary Tuesday?

Hold that, because this phrase turns out to be about something other than what we all assume.

We hear through thick and thin as good times and bad. Prosperity and hardship. Feast and famine. That’s the standard reading, and it makes the phrase a promise about fortune: I’ll be here when you’re up and I’ll be here when you’re down.

But the phrase doesn’t come from fortune at all. It comes from a forest.

The old version is longer, and you can find it in the oldest layers of English — through thicket and through thin wood. Two kinds of terrain. Thick ground, where the trees crowd and the undergrowth tangles and you have to push your way through by force. And thin ground, where the wood opens out and the walking is easy.

So it was never about your bank balance or your luck. It was about the ground under your feet on a long journey through a wood, and about a companion who keeps walking whatever the ground does.

And that reframing does something quiet and important. Because it means the phrase isn’t primarily about endurance. It’s about direction.

The point isn’t that this person can withstand hardship. The point is that this person doesn’t change route based on conditions. The terrain has no vote in where they’re going. They came into the wood with you, they intend to come out the other side with you, and whether the current hundred meters is a bramble thicket or an open glade is simply not a variable in their decision-making.

That’s a much more interesting definition of loyalty than sticks around when things are bad. It’s constancy of heading.

Now here’s where the original meaning earns its keep, because I want to talk about the thin.

We all understand the thick. It’s the crisis. The hospital, the funeral, the collapse. And we know how to think about it: those are the times you find out who your friends are, and everyone has a story about who showed up. Fair enough. That’s real.

But nobody talks about the thin.

Thin ground is the easy stretch. Nothing is wrong. There’s no drama, no emergency, no obvious role for anyone to play. It’s the long ordinary years of a friendship. It’s the Tuesday. It’s a marriage in a period where nothing whatsoever is happening.

And an enormous number of people leave in the thin.

They can absolutely handle your catastrophe. Give them a crisis and they arrive with soup within the hour and they are magnificent. What they cannot handle is six years of nothing much. They drift not because it got hard but because it stopped being interesting — because a crisis provides a reason to be there and ordinary time doesn’t.

I think we badly under-honor the people who stay through the thin, and it’s because thin loyalty is invisible. There’s no story in it. Nobody says she was extraordinary during that entirely uneventful decade. The person who calls you every other Sunday for eleven years about nothing has done something far more difficult than the person who was heroic for a weekend, and they will never once be thanked for it, because there’s no event to attach the thanks to.

And there’s something in the forest image that makes this even sharper. In a wood, thin ground is easier to walk — but it’s also where you’re exposed. No cover, nowhere to hide, and you can be seen from a long way off. Which is oddly true of easy periods in a life. When nothing is going wrong, there’s no shelter of drama to stand behind, and people find out who you actually are when there’s no emergency to be good in.

Some friendships only work in the thick. Take away the crisis and there’s nothing there. They were never a companionship; they were a rescue, and rescues end.

Now, the other half. The thick.

The forest reading gives us something useful here too. In a thicket, you can’t see far ahead. That’s the actual feature of dense ground — the horizon collapses to a few meters. You cannot tell how much more of it there is, or whether it opens out just beyond that stand of trees.

Which is exactly the character of a hard season. It’s not just that it’s difficult. It’s that from inside it, you cannot see the edge, and you begin to suspect there isn’t one — that the whole wood is like this, and always was.

And that’s why the companion matters so much in the thick. Not because they can clear the brambles for you; mostly they can’t. But because a person walking beside you is evidence that the route continues. Someone who’s still moving forward is a claim about the existence of the far side.

So the promise embedded in this phrase is more precise than it sounds. It isn’t I will make it easier. It’s I will not change direction because of ground conditions. Which is a promise a person can actually keep, unlike most of the grander ones.

And the reason it’s traditionally said as a vow — through thick and thin — is that it’s the only sensible thing to promise about a journey whose terrain nobody can see in advance. You can’t promise the wood will be kind. You can only promise about yourself.

So here’s what I’ll leave you with tonight, and it’s the question I think this phrase has been quietly holding all along.

Everyone can name the people who showed up in the thick. That list is short and you’ve had it for years.

So make the other list. Who has walked with you through the thin — through the flat, uneventful, entirely undramatic stretches where there was no reason to be there and nothing to be good at? Who kept calling when nothing was wrong?

And the harder half of it: whose thin ground have you quietly wandered off from — not because anything went badly, but because nothing did?