We tend to treat “tolerance” as a moral word — be tolerant, have tolerance for people who aren’t like you. That meaning is real and it matters. But there’s a second meaning we almost always ignore, and it might be the more useful one: tolerance is a range. In engineering it’s the band of variance a part can accept before it stops doing its job — and once you see that tolerance is a range rather than a target, a lot of how we live and work quietly rearranges itself.
The other meaning comes from engineering. Every part that connects to another part — a bolt, a bracket, a carabiner holding a trapeze artist forty feet in the air — has a tolerance. It’s the acceptable range of variance before the thing stops doing its job. Not a single perfect number. A range. And the size of that range isn’t fixed; it changes depending on what’s being asked of the part.
That distinction quietly reorganizes a lot of productivity advice.
Why tolerance is a range, not a bullseye
So much of how we think about getting things done is built around precision. Hit the target. Optimize the routine. Be exact. We hear about time blindness and best practices and we absorb the message underneath them: if you aren’t precise, you’re doing it wrong.
But precision is expensive, and you can’t spend it everywhere. If you try to be perfectly exact about everything, you run out of room for the things that genuinely require it. There’s a John Steinbeck line I keep coming back to — now that you don’t have to be perfect, you can be good. Tolerance is what makes “good” possible. It’s the permission to let some things vary so the important things can hold.
Enough is tolerance wearing a different shirt
This is also why “enough” is so slippery. Enough isn’t a number you set once. It’s a tolerance, and tolerances flex. A wardrobe that’s been more than enough for years suddenly isn’t enough the week of a graduation, because a new demand — a heavier load — got added to the system. Nothing was wrong with the old amount. The conditions changed, so the range changed.
Minimalism stumbles here when it forgets this. The goal was never to own the fewest possible things in the abstract. It was to match what you have to what you actually need, knowing that need shifts from person to person and season to season.
Narrow the choices, widen the room
Here’s the part that surprised me most. Tolerance isn’t only about narrowing. Walk into Costco and you’ll find one brand of ketchup in three sizes. That’s a deliberately narrow tolerance, and it does something generous: it spares you the decision fatigue of choosing, which leaves you with enough energy to notice the broom, the chips, the thing you didn’t know you wanted. Narrowing in one place widened the room in another. It’s one more sign that tolerance is a range you can shape, not just one you inherit.
Knowing your tolerance takes patience
None of this works without two things we’re not great at: patience and grace. Because tolerance is a range, you’ll constantly be bumping into its edges. The person afraid to drive into the city and the person who can’t understand that fear are both operating inside ranges shaped by what they’ve been exposed to. Tolerance — in both senses of the word — asks you to live in the reasoned middle, not at the purely logical or purely emotional extreme.
So before you chase the bullseye on your next project, your next purchase, your next plan, ask the quieter question first: what’s my actual range here? You might find you have far more room than you’ve been giving yourself.