That which exists through itself is called The Eternal. The Eternal has neither name nor shape. It is the one essence, the one primal spirit. Essence and life cannot be seen. They are contained in the light of heaven. The light of heaven cannot be seen. It is contained in the two eyes.

No matter how eloquently a dog may bark, he cannot tell you that his parents were poor, but honest.

The people who are regarded as moral luminaries are those who forego ordinary pleasures themselves and find compensation in interfering with the pleasures of others.

Why repeat the old errors, if there are so many new errors to commit?

Whoever wishes to become a philosopher must learn not to be frightened by absurdities.

Whether science-and indeed civilization in general-can long survive depends upon psychology, that is to say, it depends upon what human beings desire.

What is best in mathematics deserves not merely to be learnt as a task, but to assimilated as a part of daily thought, and brought again and again before the mind with ever-renewed encouragement.