There are two kinds of disease of the soul, vice and ignorance.

The misuse of language induces evil in the soul.

The writer is the engineer of the human soul.

Once spirit was God, then it became man, and now it is even becoming mob.

All instincts that do not discharge themselves outwardly turn inward - this is what I call the internalization of man: thus it was that man first developed what was later called his soul.

The money one gets for selling one's soul is always spent in deadening one's conscience, so the net gain at the end of a lifetime is no greater than if the diabolic bargain had not been struck.