A person who doubts himself is like a man who would enlist in the ranks of his enemies and bear arms against himself. He makes his failure certain by himself being the first person to be convinced of it.
Indecision and delays are the parents of failure.
Failure happens all the time. It happens every day in practice. What makes you better is how you react to it.
All human actions are equivalent... and all are on principle doomed to failure.
It is wise to keep in mind that neither success nor failure is ever final.
The young think that failure is the Siberian end of the line banishment from all the living and tend to do what I then did - which was to hide.
Do not be embarrassed by your failures learn from them and start again.
They who have conquered doubt and fear have conquered failure.
For every failure there's an alternative course of action. You just have to find it. When you come to a roadblock take a detour.
Success is not built on success. It's built on failure. It's built on frustration. Sometimes its built on catastrophe.