Success is peace of mind which is a direct result of self-satisfaction in knowing you did your best to become the best you are capable of becoming.
It was the best of times, it was the worst of times.
best of times, worst of times, best
He who has done his best for his own time has lived for all times.
best for his own, lived for all times
I do the very best I know how - the very best I can and I mean to keep on doing so until the end.
Sometimes when you innovate, you make mistakes. It is best to admit them quickly, and get on with improving your other innovations.