Nothing succeeds like success.
All human wisdom is summed up in two words wait and hope.
Happiness is like those palaces in fairy tales whose gates are guarded by dragons: we must fight in order to conquer it.
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.
How is it that little children are so intelligent and men so stupid? It must be education that does it.
He was thinking alone, and seriously racking his brain to find a direction for this single force four times multiplied, with which he did not doubt, as with the lever for which Archimedes sought, they should succeed in moving the world, when some one tapped gently at his door.