You build on failure. You use it as a stepping stone. Close the door on the past. You don't try to forget the mistakes, but you don't dwell on it. You don't let it have any of your energy, or any of your time, or any of your space.

Failure as fuel, not home

We tend to think of failure as something to either obsess over or pretend never happened. Cash points to a third way that's actually harder: acknowledge it, extract the lesson, then consciously move on. That's not the same as forgetting. Your mistakes stay in your memory—they become reference points, not anchors.

The tricky part is that distinction between learning and dwelling. You can review what went wrong for five minutes and come away sharper, or you can review it for five days and come away hollowed out. The difference isn't the time spent so much as the energy you attach to it. One is investigation. The other is punishment. Most of us default to punishment without realizing it, replaying conversations or decisions like we're trying to find the exact moment we got it wrong, as if precision in self-blame somehow changes the outcome.

What Cash understood is that your mental space is real estate. Every moment you spend circling past failures is a moment you're not building something new. The past provides material; it shouldn't provide residence.