This is one race of people for whom psychoanalysis is of no use whatsoever.

The unconscious of one human being can react upon that of another without passing through the conscious.

The behavior of a human being in sexual matters is often a prototype for the whole of his other modes of reaction in life.

The facts which have caused us to believe in the dominance of the pleasure principle in mental life also find expression in the hypothesis that the mental apparatus endeavours to keep the quantity of excitation present in it as low as possible or at least to keep it constant.

Conservatism, however, is too often a welcome excuse for lazy minds, loath to adapt themselves to fast changing conditions.

We choose not randomly each other. We meet only those who already exists in our subconscious.

Pathology has made us acquainted with a great number of states in which the boundary lines between the ego and the external world become uncertain or in which they are actually drawn incorrectly. There are cases in which parts of a person's own body, even portions of his own mental life - his perceptions, thoughts and feelings -, appear alien to him and as not belonging to his ego; there are other cases in which he ascribes to the external world things that clearly originate in his own ego and that ought to be acknowledged by it.