I use [Heraclitus' discovery of] enantiodromia for the emergence of the unconscious opposite in the course of time. This characteristic phenomenon practically always occurs when an extreme, onesided tendency dominates conscious life; in time an equally powerful counterposition is built up, which first inhibits the conscious performance and subsequently breaks through the conscious control.

...the soul does not require the organs of sense in order to see, hear, smell, taste and feel, in a much more perfect state; but with this great difference, that in such a state, it stands in much nearer connection with the spirtual than the material world.

Mind and matter are two different aspects of one and the same thing.

The meeting of two personalities is like the contact of two chemical substances: if there is any reaction, both are transformed.

In thirty years I have treated many patients. Among all my patients in the second half of life, every one of them fell ill because he had lost that which the living religions of every age had given their followers, and none of them was really healed who did not regain his religious outlook.

The collective unconscious contains the whole spiritual heritage of mankind's evolution born anew in the brain structure of every individual.

It is often tragic to see how blatantly a man bungles his own life and the lives of others yet remains totally incapable of seeing how much the whole tragedy originates in himself, and how he continually feeds it and keeps it going.