It is easier to criticize than to correct our past errors. Livy
The readiest and surest way to get rid of censure, is to correct ourselves. Demosthenes
A man must be big enough to admit his mistakes, smart enough to profit from them, and strong enough to correct them. John C. Maxwell
If you make a mistake, don't hesitate to correct it. Japanese Proverb
It is the duty of friends mutually to correct each other. Latin Proverb
One who talks to himself can not be wrong.Ie no one to correct him. Swahili Proverb