This theory of punishment which we have established, the theory which is directly supported by sound reason, is certainly in the main no new thought; but it is a thought which was almost supplanted by new errors, and therefore it was necessary to exhibit it as distinctly as possible. The same thing is in its essence contained in what Puffendorf says on the subject, "De Officio Hominis et Civis" (Bk. ii. chap. 12). Hobbes also agrees with it, "Leviathan" (chaps. 15-28). In our own day Feurbach is well known to have maintained it. Indeed, it occurs even in the utterances of the ancient philosophers. Plato expresses it clearly in the "Protagoras" (p. 114, edit. Bip.), also in the "Gorgias" (p. 168), and lastly in the eleventh book of the "Laws" (p. 165). Seneca expresses Plato's opinion and the theory of all punishment in the short sentence, "Nemo prudens punit, quia peccatum est; sed ne peccetur" (De Ira, i. 16).