I was making frequent use of cocaine at that time ... I had been the first to recommend the use of cocaine, in 1885, and this recommendation had brought serious reproaches down on me.

I do not in the least underestimate bisexuality... I expect it to provide all further enlightenment.

It sounds not only disagreeable but also paradoxical, yet it must nevertheless be said that anyone who is to be really free and happy in love must have surmounted his respect for women and have come to terms with the idea of incest with his mother or sister.

We must love or we grow ill.

What progress we are making. In the Middle Ages they would have burned me. Now they are content with burning my books.

In almost every place where we find totems we also find a law against persons of the same totem having sexual relations with one another and consequently against their marrying. This, then, is 'exogamy', an institution related to totemism.

Thinking in pictures is, therefore, only a very incomplete form of becoming conscious. In some way, too, it stands nearer to unconscious processes than does thinking in words, and it is unquestionably older than the latter both ontogenetically and phylogenetically.