The world, nature, human beings, do not move like machines. The edges are never clear-cut, but always frayed. Nature never draws a line without smudging it.
Do not criticize your government when out of the country. Never cease to do so when at home
Science should be on tap, not on top.
In defeat, unbeatable; in victor, unbearable
You must look at facts, because they look at you.
The only guide to a man's conscience, the only shield to his memory is the rectitude and sincerity of his actions.