And whatsoever Lawes bind In Foro Interno, may be broken, not onely by a fact contrary to the Law but also by a fact according to it, in case a man think it contrary. For though his Action in this case, be according to the Law; which where the Obligation is In Foro Interno, is a breach. The Laws Of Nature Are Eternal; The Lawes of Nature are Immutable and Eternall, For Injustice, Ingratitude, Arrogance, Pride, Iniquity, Acception of persons, and the rest, can never be made lawfull. For it can never be that Warre shall preserve life, and Peace destroy it. And Yet Easie The same Lawes, because they oblige onely to a desire, and endeavour, I mean an unfeigned and constant endeavour, are easie to be observed. For in that they require nothing but endeavour; he that endeavoureth their performance, fulfilleth them; and he that fulfilleth the Law, is Just. The Science Of These Lawes, Is The True Morall Philosophy And the Science of them, is the true and onely Moral Philosophy. For Morall Philosophy is nothing else but the Science of what is Good, and Evill, in the conversation, and Society of mankind. Good, and Evill, are names that signifie our Appetites, and Aversions; which in different tempers, customes, and doctrines of men, are different: And divers men, differ not onely in their Judgement, on the senses of what is pleasant, and unpleasant to the tast, 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 himselfe; 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 man is in the condition of meer Nature, (which is a condition of War,) as private Appetite is the measure of Good, and Evill: and consequently all men agree on this, that Peace is Good, and therefore also the way, or means of Peace, which (as I have shewed before) are Justice, Gratitude, Modesty, Equity, Mercy, & the rest of the Laws of Nature, are good; that is to say, Morall Vertues; and their contrarie Vices, Evill. Now the science of Vertue and Vice, is Morall Philosophie; and therfore the true Doctrine of the Lawes of Nature, is the true Morall Philosophie. But the Writers of Morall Philosophie, though they acknowledge the same Vertues and Vices; Yet not seeing wherein consisted their Goodnesse; nor that they come to be praised, as the meanes of peaceable, sociable, and comfortable living; place them in a mediocrity of passions: as if not the Cause, but the Degree of daring, made Fortitude; or not the Cause, but the Quantity of a gift, made Liberality.