A LAW OF NATURE, (Lex Naturalis,) is a Precept, or generall 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,