Sometimes a cigar is just a cigar.

Knowledge is the intellectual manipulation of carefully verified observations.

[The child] takes his play very seriously and he expends large amounts of emotion on it. The opposite of play is not what is serious but what is real.

Not to know the past is to be in bondage to it, while to remember, to know, is to be set free.

The only unnatural sexual behavior is none at all.

The sexual wishes in regard to the mother become more intense and the father is perceived as an obstacle to the; this gives rise to the Oedipus complex.

The first requisite of civilization, therefore, is that of justice — that is, the assurance that a law once made will not be broken in favour of an individual. This implies nothing as to the ethical value of such a law.