Psalms 78:5

"How great things," he says, "He has commanded our fathers, to make the same known to their sons?" [Psalm 78:5]. These words do point out two peoples as it were, the one belonging to the Old Testament, the other to the New: for in that he says, he has implied that they received the commandments, "to make them known to their sons," but that they did not know or do them: but they received them themselves, to the end "that another generation might know," what the former knew not.

"They have not been hidden from their sons in another generation." This is our generation wherein there hath been given to us regeneration. "Telling forth the praises of the Lord and His powers, and His wonderful works which He hath done." The order of the words is, "and our fathers have told unto us, telling forth the praises of the Lord." The Lord is praised, in order that He may be loved. For what object can be loved more to our health? "And He hath raised up a testimony in Jacob, and hath set a law in Jacob." This is the beginning whereof hath been spoken above, "I will declare propositions from the beginning." So then the beginning is the Old Testament, the end is the New. For fear doth prevail in the law? "But the end of the law is Christ for righteousness to every one believing;" at whose bestowing "love is shed abroad in our hearts through the Holy Spirit, which hath been given to us:" and love made perfect doth cast out fear, inasmuch as now without the Law the righteousness of God hath been made manifest. But inasmuch as He hath a testimony by the Law and the Prophets, therefore, "He hath raised up a testimony in Jacob." For even that Tabernacle which was set up with a work so remarkable and full of such wondrous meanings, is named the Tabernacle of Testimony, wherein was the veil over the Ark of the Law, like the veil over the face of the Minister of the Law; because in that dispensation there were "parables and propositions." For those things which were being preached and were coining to pass were hidden in veiled meanings, and were not seen in unveiled manifestations. But "when thou shall have passed over unto Christ," saith the Apostle, "the veil shall be taken away." For "all the promises of God in Him are yea, Amen." Whosoever therefore doth cleave to Christ, hath the whole of the good which even in the letters of the Law he perceiveth not: but whosoever is an alien from Christ, doth neither perceive, nor hath. "He hath set a law in Israel." After his usual custom he is making a repetition. For "He hath raised up a testimony," is the same as, "He hath set a law," and "in Jacob," is the same as "in Israel." For as these are two names of one man, so law and testimony are two names of one thing. Is there any difference, saith some one, between "hath raised up" and "hath set"? Yea indeed, the same difference as there is between "Jacob" and "Israel:" not because they were two persons, but these same two names were bestowed upon one man for different reasons; Jacob because of supplanting, for that he grasped the foot of his brother at his birth: but Israel because of the vision of God. So "raised up" is one thing, "set" is another. For, "He hath raised up a testimony," as far as I can judge, hath been said because by it something has been raised up; "For without the Law," saith the Apostle, "sin was dead: but I lived sometime without the Law: but at the coming in of the commandment sin revived." Behold that which hath been raised up by the testimony, which is the Law, so that what was lying hidden might appear, as he saith a little afterwards: "But sin, that it might appear sin, through a good thing hath wrought in me death." But "He hath set a law," hath been said, as though it were a yoke upon sinners, whence hath been said, "For upon a just man law hath not been imposed." It is a testimony then, so far forth as it doth prove anything; but a law so far forth as it doth command; though it is one and the same thing. Wherefore just as Christ is a stone, but to believers for the Head of the corner, while to unbelievers a stone of offence and a rock of scandal; so the testimony of the Law to them that use not the Law lawfully, is a testimony whereby sinners are to be convicted as deserving of punishment; but to them that use the same lawfully, is a testimony whereby sinners are shown unto whom they ought to flee in order to be delivered...