One of my favorites from my Marine Corps days, or at least what I told my guys:
"If you're not making mistakes, you're not trying hard enough. If you're making the same mistake twice, you're not learning."
That's cleaned up a bit but you got the gist
"If you're not making mistakes, you're not trying hard enough. If you're making the same mistake twice, you're not learning."
That's cleaned up a bit but you got the gist
