The doctor should be opaque to his patients and, like a mirror, should show them nothing but what is shown to him.

In human beings pure masculinity or femininity is not to be found either in a psychological or biological sense.

We know less about the sexual life of little girls than of boys. But we need not feel ashamed of this distinction; after all, the sexual life of adult women is a 'dark continent' for psychology.

But the repressed merges into the id as well, and is merely a part of it. The repressed is only cut off sharply from the ego by the resistances of repression; it can communicate with the ego through the id.

I think that in general it is a good plan occasionally to bear in mind the fact that people were in the habit of dreaming before there was such a thing as psychoanalysis.

Where does a thought go when it's forgotten?

Knowledge is the intellectual manipulation of carefully verified observations.