It doesn't so much matter where we end up as how we got there. What has happened in the recent past drives our emotional response much more than how … - Annie Duke

In general, when we quit, we fear two things: that we've failed and that we've wasted our time, effort, or money. Waste is a forward-looking problem, not a backward-looking one.

That's the funny thing about grit. While grit can get you to stick to hard things that are worthwhile, grit can also get you to stick to hard things that are no longer worthwhile. The trick is in figuring out the difference.

When you overfit decision quality to outcome quality, you risk repeating decision errors that, thanks to luck, preceded a good outcome. You may also avoid repeating good decisions that, because of luck, didn't work out.