Another technique for fending off suffering is the employment of the displacements of libido which our mental apparatus permits of and through which its function gains so much in flexibility. The task here is that of shifting the instinctual aims in such a way that they cannot come up against frustration from the external world.

Only the real, rare, true scientific minds can endure doubt, which is attached to all our knowledge.

The more the fruits of knowledge become accessible to men, the more widespread is the decline of religious belief.

The madman is a dreamer awake

Loneliness and darkness have just robbed me of my valuables.

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.

Maturity is the ability to postpone gratification.