But that which is done right, in obedience to reason, the followers of the Stoics call προσῆκον and καθῆκον, that is, incumbent and fitting. What is fitting is incumbent. And obedience is founded on commands. And these being, as they are, the same as counsels—having truth for their aim, train up to the ultimate goal of aspiration, which is conceived of as the end (τέλος). And the end of piety is eternal rest in God. And the beginning of eternity is our end. The right operation of piety perfects duty by works; whence, according to just reasoning, duties consist in actions, not in sayings. And Christian conduct is the operation of the rational soul in accordance with a correct judgment and aspiration after the truth, which attains its destined end through the body, the soul’s consort and ally. Virtue is a will in conformity to God and Christ in life, rightly adjusted to life everlasting. For the life of Christians, in which we are now trained, is a system of reasonable actions—that is, of those things taught by the Word—an unfailing energy which we have called faith. The system is the commandments of the Lord, which, being divine statutes and spiritual counsels, have been written for ourselves, being adapted for ourselves and our neighbours. Moreover, they turn back on us, as the ball rebounds on him that throws it by the repercussion. Whence also duties are essential for divine discipline, as being enjoined by God, and furnished for our salvation. And since, of those things which are necessary, some relate only to life here, and others, which relate to the blessed life yonder, wing us for flight hence; so, in an analogous manner, of duties, some are ordained with reference to life, others for the blessed life. The commandments issued with respect to natural life are published to the multitude; but those that are suited for living well, and from which eternal life springs, we have to consider, as in a sketch, as we read them out of the Scriptures.