For, if in worldly matters no man lives for himself, but artisan, and soldier, and husbandman, and merchant, all of them contribute to the common good, and to their neighbor’s advantage; much more ought we to do this in things spiritual. For this is most properly to live: since he at least who is living for himself only, and overlooking all others, is useless, and is not so much as a human being, nor of our race.