Let every man judge according to his own standards, by what he has himself read, not by what others tell him.

The difference between what the most and the least learned people know is inexpressibly trivial in relation to that which is unknown.

Curiosity is its own reason.

The highest principles for our aspirations and judgments are given to us in the Jewish-Christian religious tradition.

There two things that are infinite, human stupidity and the universe, I don't know about the universe

All these primary impulses, not easily described in words, are the springs of man's actions.

Men should continue to fight, but they should fight for things worth while, not for imaginary geographical lines, racial prejudices and private greed draped in the color's of patriotism.