Intolerance of groups is often, strangely enough, exhibited more strongly against small differences than against fundamental ones.

Where questions of religion are concerned, people are guilty of every possible sort of dishonesty and intellectual misdemeanor.

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.

We have long observed that every neurosis has the result, and therefore probably the purpose, of forcing the patient out of real life, of alienating him from actuality.

By abolishing private property one deprives the human love of aggression.

We find a place for what we lose. Although we know that after such a loss the acute stage of mourning will subside, we also know that we shall remain inconsolable and will never find a substitute. No matter what may fill the gap, even if it be filled completely, it nevertheless remains something else.

Cruelty and intolerance to those who do not belong to it are natural to every religion.