What a distressing contrast there is between the radiant intelligence of the child and the feeble mentality of the average adult.

The mind is like an iceberg, it floats with one-seventh of its bulk above water.

The psychical, whatever its nature may be, is itself unconscious.

Incidentally, why was it that none of all the pious ever discovered psycho-analysis? Why did it have to wait for a completely godless Jew?

It is impossible to overlook the extent to which civilization is built upon a renunciation of instinct.

Like the physical, the psychical is not necessarily in reality what it appears to us to be.