I take up the standpoint that the tendency to aggression is an innate, independent, instinctual disposition in man, and I come back now to the statement that it constitutes the most powerful obstacle to culture.

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

Much of our highly valued cultural heritage has been acquired at the cost of sexuality.

Writing was in its origin, the voice of an absent person.

Psychoanalysis is in essence a cure through love.

He that has eyes to see and ears to hear may convince himself that no mortal can keep a secret. If his lips are silent, he chatters with his fingertips; betrayal oozes out of him at every pore.

Crystals reveal their hidden structures only when broken.