Benedict de Spinoza, THE ETHICS
(Ethica Ordine Geometrico Demonstrata)
Translated by R. H. M. Elwes
PART IV: Of Human Bondage, or the Strength of the Emotions
Human infirmity in moderating and checking the emotions I name bondage:
for, when a man is a prey to his emotions, he is not his own master, but
lies at the mercy of fortune: so much so, that he is often compelled,
while seeing that which is better for him, to follow that which is worse.
Why this is so, and what is good or evil in the emotions, I propose to
show in this part of my treatise. But, before I begin, it would be well
to make a few prefatory observations on perfection and imperfection,
good and evil.