Difference Between Law And Right

I find the words Lex Civilis, and Jus Civile, that is to say, Law and Right Civil, promiscuously used for the same thing, even in the most learned Authors; which neverthelesse ought not to be so. For Right is Liberty, namely that Liberty which the Civil Law leaves us: But Civill Law is an Obligation; and takes from us the Liberty which the Law of Nature gave us. Nature gave a Right to every man to secure himselfe by his own strength, and to invade a suspected neighbour, by way of prevention; but the Civill Law takes away that Liberty, in all cases where the protection of the Lawe may be safely stayd for. Insomuch as Lex and Jus, are as different as Obligation and Liberty.