20. The half-shekel may also be understood of the Old Testament, the whole shekel for the price of both Testaments, for according to the Law every one was redeemed by the Law, but he who is redeemed according to the Gospel, pays the half-shekel according to the Law, he is redeemed by the Blood of Christ according to grace, having a double redemption both of devotion and of Blood. For not even faith alone is sufficient for perfection, unless the redeemed also obtain the grace of Baptism, and receive the Blood of Christ. Good then is that half-shekel which is paid to God. Sidenote: Rev. i. 8. Sidenote: Deut. vi. 4. 21. The half-shekel is not a penny[15], but is different. Again, in the penny is the image of Cæsar, in the half-shekel the image of God, for it is of one God, and formed after God Himself. Beginning from One it is infinitely diffused, and again, from the Infinite all things come back to one, as their end, for God is both the beginning and the end of all things. Wherefore arithmeticians have not called ‘one’ a number, but an element of number. And this we have said because it is written, _I am Alpha and Omega, the beginning and the ending_; and, _Hear, O Israel: the Lord our God is One Lord_. 22. Be thou then, after the likeness of God, one and the same; not sober to-day, drunken to-morrow; to-day pacific, to-morrow quarrelsome; to-day frugal, to-morrow immoderate; for each person is changed by diversity of manners and becomes another man, in whom that which he was is not recognized, while he begins to be that which he was not, degenerate from himself. It is a grievous thing to be changed for the worse. Be then as the image on the half-shekel, immutable, keeping daily the same deportment. Seeing the half-shekel, observe the image, that is, seeing the Law, observe in the Law Christ the Image of God; for He _is the Image of the invisible_ and incorruptible _God_; let Him be displayed before thee as in the mirror of the Law. Confess Him in the Law, that thou mayest know Him again in the Gospel. If thou hast known Him in His precepts, acknowledge Him in works. Farewell, and if you do not think that this shekel has been committed to me unprofitably, doubt not to commit to me a second time whatever you may have to communicate. LETTER VIII. A.D. 381. S. AMBROSE in this letter answers the objections raised against the Scriptures, that they were not written according to the rules of art, and illustrates his argument with various passages. AMBROSE TO JUSTUS. Sidenote: Acts ii. 4.