Life begins at forty
I turn forty this September. A couple of months out, I keep expecting to feel the thing everyone warns you about, the quiet dread, the sense of a door closing. It has not shown up. If anything I trust this age more than any I have been. It feels less like a halfway mark and more like the point where the earlier years finally start to pay off.
Looking back, the decades sort themselves into a simple shape.
The twenties: prove you can build
My twenties were about proving I could build the thing at all. I started in software in 2006, and back then the whole game was capability. Could you make it work, ship it, keep it standing when it broke at midnight. You say yes to everything because you are still finding out what you are made of, and you measure yourself by how much you can carry. It is a good way to spend your twenties. It is also exhausting, and it teaches you almost nothing about judgment, because you have not yet earned the scars that produce it.
The thirties: learn what not to build, and who to build with
The thirties were where the real education happened, and it was mostly subtraction. You learn what not to build, which is a harder and more valuable skill than learning what you can. You learn that a brilliant feature aimed at the wrong problem is just expensive noise. And you learn, sometimes the slow and painful way, who to build with, because the people around you decide the ceiling more than any technology does. I started my companies in this decade, and the biggest lesson was not technical. It was that the work is only as good as the people who show up for it, and that keeping the right people is a job you never finish.
The forties: where it compounds
What I feel arriving now is the compounding. The capability from the twenties and the judgment from the thirties finally sit in the same hands, and the result is not more speed. It is more patience. You stop rushing. You start playing the longer innings, and the patience you used to fake becomes real, because you have finally seen enough cycles to trust that the slow, sound decision usually wins.
I think that is what people actually mean when they say life begins at forty. Not that the good part starts late, but that this is the first time you have both the tools and the temperament at once. For most of my life I was strong on one and short on the other.
The same lesson, pointed at software
Everything I believe about business turns out to be this same idea wearing work clothes. Stay in the room after the sale. Build for the day the thing actually matters, not the day it demos. Do not disappear, do not cut the corner you will pay for later. Those are not clever strategies. They are just what patience looks like when you point it at how you run a company. It took me two decades and two companies to be able to live them instead of just say them.
So I am not dreading September. I have two daughters growing up fast, companies I still want to build into something that outlasts me, and, for the first time, the temperament to do it without burning the whole thing down in a hurry. The twenties gave me the engine. The thirties gave me the steering. Forty is where you finally get to drive.
More of how I think is in the rest of my writing, or come say hello.