And the science of them is the true and only moral philosophy. For moral philosophy is nothing else but the science of what is “good” and “evil,” in the conversation and society of mankind. “Good” and “evil” are names that signify our appetites, and aversions; which in different tempers, customs, and doctrines of men, are different: and divers men, differ not only in their judgment, on the senses of what is pleasant and unpleasant to the taste, smell, hearing, touch, and sight; but also of what is conformable or disagreeable to reason, in the actions of common life. Nay, the same man, in divers times, differs from himself; and one time praiseth, that is, calleth good, what another time he dispraiseth, and calleth evil: from whence arise disputes, controversies, and at last war. And therefore so long as a man is in the condition of mere nature, which is a condition of war, as private appetite is the measure of good and evil: and consequently all men agree on this, that peace is good, and therefore also the way or means of peace, which, as I have showed before, are “justice,” “gratitude,” “modesty,” “equity,” “mercy,” and the rest of the laws of Nature, are good; that is to say, “moral virtues”; and their contrary “vices,” evil.