I found this quote from Garry Kasparov recently that's been living in my head rent-free. The chess grandmaster said:
"The eternal paradox of peak performance in chess, or any endeavor, really, is how to learn from your failures while still carrying on as if you are invincible. You must learn and forget simultaneously."
You know that moment when someone articulates something you've been feeling but couldn't quite express?
That's what this did for me.