Psalms 53:8

In the six former books we have endeavoured, reverend brother Ambrosius, according to our ability to meet the charges brought by Celsus against the Christians, and have as far as possible passed over nothing without first subjecting it to a full and close examination. And now, while we enter upon the seventh book, we call upon God through Jesus Christ, whom Celsus accuses, that He who is the truth of God would shed light into our hearts and scatter the darkness of error, in accordance with that saying of the prophet which we now offer as our prayer, “Destroy them by Thy truth.” For it is evidently the words and reasonings opposed to the truth that God destroys by His truth; so that when these are destroyed, all who are delivered from deception may go on with the prophet to say, “I will freely sacrifice unto Thee,” and may offer to the Most High a reasonable and smokeless sacrifice.

Do we then by grace make void free will? God forbid! Nay, rather we establish free will. For even as the law by faith, so free will by grace, is not made void, but established. For neither is the law fulfilled except by free will; but by the law is the knowledge of sin, by faith the acquisition of grace against sin, by grace the healing of the soul from the disease of sin, by the health of the soul freedom of will, by free will the love of righteousness, by love of righteousness the accomplishment of the law. Accordingly, as the law is not made void, but is established through faith, since faith procures grace whereby the law is fulfilled; so free will is not made void through grace, but is established, since grace cures the will whereby righteousness is freely loved. …

10. “Voluntarily I will sacrifice to Thee” ( ver. 6 ). Who can even understand this good thing of the heart, at another’s speaking thereof, unless in himself he hath tasted it? What is, “Voluntarily I will sacrifice to Thee”?… For what sacrifice here shall I take, brethren? or what worthily shall I offer to the Lord for His mercy? Victims shall I seek from flock of sheep, ram shall I select, for any bull in the herds shall I look out, frankincense indeed from the land of the Sabæans shall I bring? What shall I do? What offer; except that whereof He speaketh, “Sacrifice of praise shall honour Me”? Wherefore then “voluntarily”? Because truly I love that which I praise. I praise God, and in the self-same praise I rejoice: in the praise of Himself I rejoice, at whom being praised, I blush not. …

2. The title then of this Psalm is, as usual, a title intimating on the threshold what is being done in the house: “To David himself for the sons of Jonadab, and for those that were first led captive.” Jonadab (he is commended to us in the prophecy of Jeremiah) was a certain man, who had enjoined his sons not to drink wine, and not to dwell in houses, but in tents. But the commandment of the father the sons kept and observed, and by this earned a blessing from the Lord. Now the Lord had not commanded this, but their own father. But they so received it as though it were a commandment from the Lord their God; for even though the Lord had not commanded that they should drink no wine and should dwell in tents; yet the Lord had commanded that sons should obey their father. …

107. “Make the freewill offerings of my mouth well pleasing, O Lord” ( ver. 108 ): that is, let them please Thee; do not reject, but approve them. By the freewill offerings of the mouth are well understood the sacrifices of praise, offered up in the confession of love, not from the fear of necessity; whence it is said, “a freewill offering will I offer Thee.” But what doth he add? “and teach me Thy judgments”? Had he not himself said above, “From Thy judgments I have not swerved”? How could he have done thus, if he knew them not? Moreover, if he knew them, in what sense doth he here say, “and teach me Thy judgments”? Is it as in a former passage, “Thou hast dealt in sweetness with Thy servant:” presently after which we find, “teach me sweetness”? This passage we explained as the words of one who was gaining in grace, and praying that he might receive in addition to what he had received.

48. The Apostle also saith that “all is the work of one and the same Spirit, distributing to each according to His will.” “According to His will,” mark you, that is, according to the judgment of a free will, not in obedience to compulsion. Furthermore, the gifts distributed by the Spirit are no mean gifts, but such works as God is wont to do, the gift of healing and of working deeds of power. While the Spirit, then, distributes as He will, the Son of God cannot set free whom He will. But hear Him speak when He does even as He will: “I have willed to do Thy will, O my God;” and again: “I will offer Thee a freewill offering.”

For among them (viz., the Egyptians) these offices which we are taught to render to the Lord at separate hours and at intervals of time, with a reminder from the convener, are celebrated continuously throughout the whole day, with the addition of work, and that of their own free will. For manual labour is incessantly practised by them in their cells in such a way that meditation on the Psalms and the rest of the Scriptures is never entirely omitted. And as with it at every moment they mingle suffrages and prayers, they spend the whole day in those offices which we celebrate at fixed times. Wherefore, except Vespers and Nocturns, there are no public services among them in the day except on Saturday and Sunday, when they meet together at the third hour for the purpose of Holy Communion. …