A “law of Nature,” lex naturalis , is a precept or general rule, found out by reason, by which a man is forbidden to do that which is destructive of his life, or taketh away the means of preserving the same; and to omit that, by which he thinketh it may be best preserved. For though they that speak of this subject, use to confound “jus” and “lex,” “right” and “law”: yet they ought to be distinguished; because “right,” consisteth in liberty to do, or to forbear; whereas “law,” determineth and bindeth to one of them; so that law and right differ as much as obligation and liberty; which in one and the same matter are inconsistent.