Science is not ... a perfect instrument, but it is a superb and invaluable tool that works harm only when taken as an end in itself.

The healthy man does not torture others.

The only thing we have to fear on this planet is man.

The self as the essence of individuality is unitemporal and unique; as an archetypal symbol it is a God-image and therefore universal and eternal.

In actual life it requires the greatest discipline to be simple, and the acceptance of oneself is the essence of the moral problem and the epitome of a whole outlook upon life.

Criticism can be effective when there is something that must be destroyed or dissolved, but it is capable only of harm when there is something to be built.

The problem of synchronicity has puzzled me for a long time, ever since the middle twenties, when I was investigating the phenomena of the collective unconscious and kept on coming across connections which I simply could not explain as chance groupings or "runs." What I found were "coincidences" which were connected so meaningfully that their "chance" concurrence would represent a degree of improbability that would have to be expressed by an astronomical figure.