A man's true secrets are more secret to himself than they are to others.
Peace is a virtual, mute, sustained victory of potential powers against probable greeds
A limited vocabulary, but one with which you can make numerous combinations, is better than thirty thousand words that only hamper the action of the mind.
Sometime I think; and sometime I am.
Science is a collection of successful recipes.
Serious people have few ideas. People with ideas are never serious.