Thomas Hobbes — "For every man that is not a fool, hath a desire to preserve himself; and to that…"

"For it is not the bare receiving of a man's message, that makes him an ambassador, but the accepting of his person."

"For there is no such thing as perpetual tranquility of mind, while we live here; because life itself is but motion, and can never be without desire, nor without fear, no more than without sense."

"For whatsoever is the object of any man's appetite or desire, that is it which he for his part calleth good: and the object of his hate and aversion, evil; and of his contempt, vile and inconsiderable…"

"The science of every man's duty, which is called ethics, is nothing else but the knowledge of what is good and evil in the actions of men."

"The skill of making and maintaining Commonwealths, consisteth in certain rules, as doth arithmetic and geometry; not (as tennis-play) on practice only: which rules, neither poor men have the leisure, …"