The moment a man questions the meaning and value of life, he is sick, since objectively neither has any existence; by asking this question one is merely admitting to a store of unsatisfied libido to which something else must have happened, a kind of fermentation leading to sadness and depression.

The goal of all life is death

If youth knew; if age could.

It is easy to see that the ego is that part of the id which has been modified by the direct influence of the external world.

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

We have become convinced that it is better to avoid such symbolic disguisings of the truth in what we tell children and not to withhold from them a knowledge of the true state of affairs commensurate with their intellectual level.

The whole life of instinct serves the one end of bringing about death.