Opposition is not necessarily enmity.

A piece of creative writing, like a day-dream, is a continuation of, and a substitute for, what was once the play of childhood.

Life, as we find it, is too hard for us; it brings us too many pains, disappointments and impossible tasks. In order to bear it we cannot dispense with palliative measures... There are perhaps three such measures: powerful deflections, which cause us to make light of our misery; substitutive satisfactions, which diminish it; and intoxicating substances, which make us insensible to it.

Religion is an illusion and it derives its strength from the fact that it falls in with our instinctual desires.

The interpretation of dreams is the royal road to a knowledge of the unconscious activities of the mind.

Unexpressed emotions will never die. They are buried alive and will come forth later in uglier ways.

I should like to raise the question whether the inevitable stunting of the sense of smell as a result of man's turning away from the earth, and the organic repression of the smell-pleasure produced by it, does not largely share in his predisposition to nervous diseases.