The dream acts as a safety-valve for the over-burdened brain.

Love is a state of temporary psychosis.

Dreams are the guardians of sleep and not its disturbers.

My way of working was different years ago. I used to wait until an idea came to me. Now I go half-way to meet it, though I don't know whether I find it any the quicker.

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

The different religions have never overlooked the part played by the sense of guilt in civilization. What is more, they come forward with a claim...to save mankind from this sense of guilt, which they call sin.

[The child] takes his play very seriously and he expends large amounts of emotion on it. The opposite of play is not what is serious but what is real.