I. The Origin of Suffering
There are three forces in human nature: thinking, feeling and willing. These three depend on the physical organisation of man. Certain acts of will appear after certain thought and feeling processes have taken place. The human organism must function in the right way if these three forces are to harmonise. If certain transmissions are interrupted, certain parts diseased, then no proper harmony exists between thinking, feeling and willing. If the organs of will are crippled a man is unable to transform his thoughts into will-impulses. He is weak as a man of action; he can doubtless think, but cannot resolve to put thoughts into reality. Another case is when a person is not in a position to let his feelings be guided rightly through thoughts, to bring his feelings into harmony with the thoughts behind them. Insanity is fundamentally nothing else than this.
Cite:
GA 55/1906-11-08_02/p032 · edition English