Demons do not exist any more than gods do, being only the products of the psychic activity of man.
Sigmund FreudWhat we call happiness in the strictest sense comes from the (preferably sudden) satisfaction of needs which have been dammed up to a high degree.
Sigmund FreudAs regards intellectual work it remains a fact, indeed, that great decisions in the realm of thought and momentous discoveries and solutions of problems are only possible to an individual, working in solitude.
Sigmund FreudConcerning the factors of silence, solitude and darkness, we can only say that they are actually elements in the production of the infantile anxiety from which the majority of human beings have never become quite free.
Sigmund FreudIn 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.
Sigmund FreudIf all the evidence put forward for the authenticity of religious teachings originates in the past, it is natural to look round and see whether the present, about which it is easier to form judgements, may not also be able to furnish evidence of the sort. If by this means we could succeed in clearing even a single portion of the religious system from doubt, the whole of it would gain enormously in credibility.
Sigmund Freud