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CHAP. IX. of a Law Natural be not exclusively a creation of the Roman jurisconsults, we may lay down that, even on the admission of Grotius himself, the dicta of the Roman jurisprudence as to what parts of known positive law must be taken to be parts of the Law of Nature, are, if not infallible, to be received at all events with the profoundest respect. Hence the system of Grotius is implicated with Roman law at its very foundation, and this connection rendered inevitable—what the legal training of the writer would perhaps have entailed without it—the free employment in every paragraph of technical phraseology, and of modes of reasoning, defining, and illustrating, which must sometimes conceal the sense, and almost always the force and cogency, of the argument from the reader who is unfamiliar with the sources whence they have been derived. On the other hand, Casuistry borrows little from Roman law, and the views of morality contended for have nothing whatever in common with the undertaking of Grotius. All that philosophy of right and wrong which has become famous, or infamous, under the name of Casuistry, had its origin in the distinction between Mortal and Venial Sin. A natural anxiety to escape the awful consequences of determining a particular act to be mortally sinful, and a desire, equally intelligible, to assist the Roman Catholic Church in its conflict with Protestantism by disburthening it of an