An important key to self- confidence is preparation. It's something you have to put forth the effort for constantly. Then maybe it'll come when you least expect it. Most people don't understand that. It is better to ask some of the questions than know all the answers.
Fools talk because they have to say something.
Plato Millions saw the apple fall, but Newton was the one who asked why. Nothing in the world is more dangerous than sincere ignorance and consciencious stupidity. Will Rogers I don't know the key to success, but the key to failure is to try to please everyone. If fifty million people say a foolish thing, it is still a foolish thing. Any fool can know.