Never neglect an extraordinary appearance or happening. It may be -- usually is, in fact -- a false alarm that leads to nothing, but it may on the other hand be the clue provided by fate to lead you to some important advance.
People are always blaming their circumstances for what they are. I don't believe in circumstances. The people who get on in this world are the people who get up and look for the circumstances they want, and, if they can't find them, make them.
If I have ever made any valuable discoveries, it has been owing more to patient attention than to any other talent.
I would rather have a mind opened by wonder than one closed by belief.
When your work speaks for itself, don't interrupt.
I'm writing an unauthorized autobiography. When it comes out I'm going to sue myself.
There may be times when we are powerless to prevent injustice, but there must never be a time when we fail to protest.
Skill is successfully walking a tightrope over Niagra Falls. Intelligence is not trying.
The rung of a ladder was never meant to rest upon, but only to hold a man's foot long enough to enable him to put the other somewhat higher.
If you think you're tops, you won't do much climbing.