Ultimate truth, if there be such a thing, demands the concert of many voices.

I can still recall vividly how Freud said to me, "My dear Jung, promise me never to abandon the sexual theory. That is the most essential thing of all. You see, we must make a dogma of it, an unshakable bulwark" ... In some astonishment I asked him, "A bulwark-against what?" To which he replied, "Against the black tide of mud"-and here he hesitated for a moment, then added of occultism.

It is in applied psychology, if anywhere, that today we should be modest and grant validity to a number of apparently contradictory opinions; for we are still far from having anything like a thorough knowledge of the human psyche, that most challenging field of scientific enquiry. For the present we have merely more or less plausible opinions that defy reconciliation.

Every victory contains the germ of future defeat.

The world will ask you who you are, and if you don't know, the world will tell you.

Where love stops, power begins, and violence, and terror

If our religion is based on salvation, our chief emotions will be fear and trembling. If our religion is based on wonder, our chief emotion will be gratitude.