A man's heterosexuality will not put up with any homosexuality, and vice versa.

Men are not gentle, friendly creatures wishing for love, who simply defend themselves if they are attacked, but ... a powerful measure of desire for aggression had to be reckoned as part of their instinctual endowment.

Like the physical, the psychical is not necessarily in reality what it appears to us to be.

Writers write for fame, wealth, power and the love of women.

The liberty of the individual is no gift of civilization. It was greatest before there was any civilization, though then, it is true, it had for the most part no value, since the individual was scarcely in a position to defend it. The development of civilization imposes restrictions on it, and justice demands that no one shall escape those restrictions.

The mind is like an iceberg, it floats with one-seventh of its bulk above water.

Anxiety in children is originally nothing other than an expression of the fact they are feeling the loss of the person they love.