De Sacrificiis Abelis Et Caini

As, therefore, good men are the strongest part of cities, with a view to their duration, so also in that state of each individual of us, which consists of soul and body, the reasoning powers which are attached to prudence and knowledge, are the firmest part of its foundation; which the legislator, using metaphorical language, calls the ransom and the first-born, on account of those reasons which I have already mentioned.