Justin Martyr

For the law promulgated on Horeb is now old, and belongs to yourselves alone; but this is for all universally. Now, law placed against law has abrogated that which is before it, and a covenant which comes after in like manner has put an end to the previous one; and an eternal and final law-namely, Christ-has been given to us, and the covenant is trustworthy, after which there shall be no law, no commandment, no ordinance. Have you not read this which Isaiah says: "Hearken unto Me, hearken unto Me, my people; and, ye kings, give ear unto Me: for a law shall go forth from Me, and My judgment shall be for a light to the nations. My righteousness approaches swiftly, and My salvation shall go forth, and nations shall trust in Mine arm?" And by Jeremiah, concerning this same new covenant, He thus speaks: "Behold, the days come, saith the Lord, that I will make a new covenant with the house of Israel and with the house of Judah; not according to the covenant which I made with their fathers, in the day that I took them by the hand, to bring them out of the land of Egypt."

And we have not in vain believed in Him, and have not been led astray by those who taught us such doctrines; but this has come to pass through the wonderful foreknowledge of God, in order that we, through the calling of the new and eternal covenant, that is, of Christ, might be found more intelligent and God-fearing than yourselves, who are considered to be lovers of God and men of understanding, but are not. Isaiah, filled with admiration of this, said: "And kings shall shut their mouths: for those to whom no announcement has been made in regard to Him shall see; and those who heard not shall understand. Lord, who hath believed our report? and to whom is the arm of the Lord revealed?"

For all the Gentiles were "desolate" of the true God, serving the works of their hands; but the Jews and Samaritans, having the word of God delivered to them by the prophets, and always expecting the Christ, did not recognise Him when He came, except some few, of whom the Spirit of prophecy by Isaiah had predicted that they should be saved.

For this is that nation which God of old promised to Abraham, when He declared that He would make him a father of many nations; not meaning, however, the Arabians, or Egyptians, or Idumaeans, since Ishmael became the father of a mighty nation, and so did Esau; and there is now a great multitude of Ammonites. ... And along with Abraham we shall inherit the holy land, when we shall receive the inheritance for an endless eternity, being children of Abraham through the like faith. ... Accordingly, He promises to him a nation of similar faith, God-fearing, righteous, and delighting the Father; but it is not you, "in whom is no faith." Therefore we are not a people to be despised, nor a barbarous race, nor such as the Carian and Phrygian nations; but God has even chosen us and He has become manifest to those who asked not after Him. "Behold, I am God," He says, "to the nation which called not on My name."

As people who have cut your souls off from this hope, it is necessary that you know how to obtain pardon of your sins and a hope of sharing in the promised blessings. There is no other way than this, that you come to know our Christ, be baptized with the baptism that cleanses you from sin (as Isaiah testified) and thus live a life free of sin.