Conscience is the name which the orthodox give to their prejudices.

All forced virtue is degrading in it effect.

It is our imagination, not our conscience, which makes us better than the beasts of the field.

Men are all the same. They always think that something they are going to get is better than what they have got.

To die for one's great ideas is glorious - and easy. The horror is to outlive them. That is our worst capability.

If the gods have no sense of humor they must weep a great deal.

A man with a career can have no time to waste upon his wife and friends; he has to devote it wholly to his enemies.