The great revolution of the future will be Nature's revolt against man.

Why did Nature create man? Was it to show that she is big enough to make mistakes, or was it pure ignorance?

The time to read is any time: no apparatus, no appointment of time and place, is necessary. It is the only art which can be practiced at any hour of the day or night, whenever the time and inclination comes, that is your time for reading; in joy or sorrow, health or illness.

Forgive everybody but yourself.

Never put off till tomorrow the book you can read today.

People who want to be amused have lost the art of living.

Fear of corrupting the mind of the younger generation is the loftiest form of cowardice.