Learning acquired in youth arrests the evil of old age; and if you understand that old age has wisdom for its food, you will so conduct yourself in youth that your old age will not lack for nourishment.

Do not look for a sanctuary in anyone except yourself.

Paper is to write things down that we need to remember. Our brains are used to think.

The attempt to combine wisdom and power has only rarely been successful and then only for a short while.

We should take care not to make the intellect our goal; it has, of course, powerful muscles, but no personality.

Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.