The very emphasis of the commandment: Thou shalt not kill, makes it certain that we are descended from an endlessly long chain of generations of murderers, whose love of murder was in their blood as it is perhaps also in ours.

In the depths of my heart I can’t help being convinced that my dear fellow-men, with a few exceptions, are worthless.

In the last analysis the entire field of psychology may reduce to biological electrochemistry.

Christmas is the alcoholidays

Sadism is all right in its place, but it should be directed to proper ends.

The pleasure principle long persists, however, as the method of working employed by the sexual instincts, which are so hard to 'educate', and, starting from those instincts, or in the ego itself, it often succeeds in overcoming the reality principle, to the detriment of the organism as a whole.

Just as a cautious businessman avoids investing all his capital in one concern, so wisdom would probably admonish us also not to anticipate all our happiness from one quarter alone.