Love is a little haven of refuge from the world.

Teachers are more than any other group the guardians of civilization.

Worry is a form of fear, and all forms of fear produce fatigue. A man who has learned not to feel fear will find the fatigue of daily life enormously diminished.

The moral thing I should wish to say to them is very simple; I should say: "Love is wise - Hatred is foolish." In this world, which is getting more and more closely interconnected, we have to learn to tolerate each other.

Either man will abolish war, or war will abolish man.

The universe may have a purpose, but nothing we know suggests that, if so, this purpose has any similarity to ours.

Science seems to be at war with itself.... Naive realism leads to physics, and physics, if true, shows naive realism to be false. Therefore naive realism, if true, is false; therefore it is false.