“xxix.) , namely, the knowledge of evil, is inadequate. Q.E.D.
Corollary.—Hence it follows that, if the human mind possessed only adequate ideas, it would form no conception of evil.
PROP. LXV. Under the guidance of reason we should pursue the greater of two goods and the lesser of two evils.
Proof.—A good which prevents our enjoyment of a greater good is in reality an evil; for we apply the terms good and bad to things, in so far as we compare them one with another (see preface to this Part); therefore, evil is in reality a lesser good; hence under the guidance of reason we seek or pursue only the greater good and the lesser evil.”