Failure is just another way to say that you cant, and there is no such thing as that. Mistakes are often veiwed as failures so here is a quote that I hope helps you!
"Wise men profit more from fools that fools from wise men; for the wise men shun the mistakes of fools, but fools do not imitate the succeses of the wise."
Cato the Elder (234 BC- 149 BC)
I will keep my ears open for better quotes. Just remember we are all human and humans make mistakes. The mistakes, or failures, we make often teach us more than the things we do correctly the first time!