In science, the credit goes to the man who convinces the world, not to the man to whom the idea first occurs.
Life is short. Stunt hard.
The greatest obstacle to being heroic is the doubt whether one may not be going to prove one's self a fool; the truest heroism is to resist the doubt; and the profoundest wisdom, to know when it ought to be resisted, and when to be obeyed.
The path to success is to take massive, determined action.