As surgeons keep their instruments and knives always at hand for cases requiring immediate treatment, so shouldst thou have thy thoughts ready to understand things divine and human, remembering in thy every act, even the smallest, how close is the bond that unites the two. Book III
Nothing is so firmly believed as that which we least know. Essays
Perhaps our greatest distinction as a species is our capacity, unique among animals, to make counter-evolutionary choices. Why Is Sex Fun?: The Evolution of Human Sexuality
Do not think that what is hard for you to master is humanly impossible; but if a thing is humanly possible, consider it to be within your reach. Book VI
Quotes