Physics, owing to the simplicity of its subject matter, has reached a higher state of development than any other science.

Hatred of enemies is easier and more intense than love of friends. But from men who are more anxious to injure opponents than to benefit the world at large no great good is to be expected.

The discipline in your life should be one determined by your own desires and your own needs, not put upon you by society or authority.

Fear is the parent of cruelty, and therefore it is no wonder if cruelty and religion go hand in hand.

It is permissible with certain precautions to speak in print of coitus, but it is not permissible to employ the monosyllabic synonym for this word.

Beggars do not envy millionaires, though of course they will envy other beggars who are more successful.

It is only theory that makes men completely incautious.