“I think that the power is the principle. The principle of moving forward, as though you have the confidence to move forward, eventually gives you confidence when you look back and see what you've done.” - Robert Downey
“Believe in yourself! Have faith in your abilities! Without a humble but reasonable confidence in your own powers you cannot be successful or happy.” - Norman Vincent Peale
“The problem with the world is that the intelligent people are full of doubts, while the stupid ones are full of confidence.” - Charles Bukowski