Even if all parts of a problem seem to fit together like the pieces of a jigsaw puzzle, one has to remember that the probable need not necessarily be the truth and the truth not always probable.

In mourning it is the world which has become poor and empty; in melancholia it is the ego itself.

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.

Adolescent stage in the development of the human race from which humanity should free itself.

We may say that hysteria is a caricature of an artistic creation, a compulsion neurosis a caricature of a religion, and a paranoiac delusion a caricature of a philosophic system.

I no longer believe that William Shakespeare the actor from Stratford was the author of the works that have been ascribed to him.

Obviously one must hold oneself responsible for the evil impulses of one's dreams. In what other way can one deal with them? Unless the content of the dream rightly understood is inspired by alien spirits, it is part of my own being.