Acts 2:38–43

"Repent," he says, "and let each one of you be baptized." Speaking of baptism, he first mentioned the laments of repentance, so that, following the custom of the Church, they might first immerse themselves in the water of their affliction, and afterward be washed in the sacrament of baptism.

And you will receive the gift of the Holy Spirit. For the promise is to you and to your children, as the Lord says through the prophet: I will pour out My Spirit on all flesh, and your sons and your daughters shall prophesy (Joel II). And what he added: And to all who are afar off, as many as the Lord our God shall call, refers to that final testimony placed from the prophet, that everyone who calls upon the name of the Lord shall be saved (Ibid.). This particularly pertains to the calling of the Gentiles, who were far removed from the fellowship of the sons of Israel in both kinship and merit, and yet were to be saved by invoking the name of the Lord according to the prophet's promise.

Since the power that restores us is the power of the whole Trinity, which holy mother Church believes in the mind, confesses in word, and professes in sign, under the distinction and property, order and natural origin of the three persons: hence it is that for the expression of these things in the Sacrament which is the first of all Sacraments, and in which this power operates firstly and principally, there ought to be an expression of the Trinity in a distinct, proper, and ordered naming, as regards the common form, although in the time of the primitive Church it could be done in the name of Christ, in which the understanding of the Trinity is enclosed.

For whereas in the Gospels, and in the epistles of the apostles, the name of Christ is alleged for the remission of sins; it is not in such a way as that the Son alone, without the Father, or against the Father, can be of advantage to anybody; but that it might be shown to the Jews, who boasted as to their having the Father, that the Father would profit them nothing, unless they believed on the Son whom He had sent. For they who know God the Father the Creator, ought also to know Christ the Son, lest they should flatter and applaud themselves about the Father alone, without the acknowledgment of His Son, who also said, "No man cometh to the Father but by me." But He, the same, sets forth, that it is the knowledge of the two which saves, when He says, "And this is life eternal, that they might know Thee, the only true God, and Jesus Christ, whom thou hast sent." Since, therefore, from the preaching and testimony of Christ Himself, the Father who sent must be first known, then afterwards Christ, who was sent, and there cannot be a hope of salvation except by knowing the two together; how, when God the Father is not known, nay, is even blasphemed, can they who among the heretics are said to be baptized in the name of Christ, be judged to have obtained the remission of sins? For the case of the Jews under the apostles was one, but the condition of the Gentiles is another. The former, because they had already gained the most ancient baptism of the law and Moses, were to be baptized also in the name of Jesus Christ, in conformity with what Peter tells them in the Acts of the Apostles, saying, "Repent, and be baptized every one of you in the name of the Lord Jesus Christ, for the remission of sins, and ye shall receive the gift of the Holy Ghost. For this promise is unto you, and to your children, and to all that are afar off, even as many as the Lord our God shall call." Peter makes mention of Jesus Christ, not as though the Father should be omitted, but that the Son also might be joined to the Father.

and be baptized, each one of you, in the name of Jesus Christ: Saving holy Baptism suffices for our cleansing of sin, and erases the stain of previous falls.

Hence Peter, when he saw some affrighted by consideration of their evil deeds, admonished them, saying, Repent, and be baptized every one of you. For, being about to speak of baptism, he spoke first of the lamentations of penitence; that they should first bathe themselves in the water of their own affliction, and afterwards wash themselves in the sacrament of baptism. With what conscience, then, can those who neglect to weep for their past misdeeds live secure of pardon, when the chief pastor of the Church himself believed that penitence must be added even to this Sacrament which chiefly extinguishes sins?

Here again Peter, though the question is put to all, is the man to answer. "Repent," says he, "and be baptized every one of you, in the name of Jesus Christ." He does not yet say, Believe, but, "Be baptized every one of you." For this they received in baptism. Then he speaks of the gain; "For the remission of sins, and ye shall receive the gift of the Holy Ghost." If you are to receive a gift, if baptism conveys remission, why delay?

What had been said was not enough. For those sayings indeed were sufficient to bring them to faith; but these are to show what things the believer behooves to do. And he said not, In the Cross, but, "In the name of Jesus Christ let every one of you be baptized." And he does not put them continually in mind of the Cross, that he may not seem to reproach them, but he says simply, "Repent: and why? That we may be punished? No: "And let each of you be baptized in the name of Jesus Christ, for the remission of sins." And yet quite other is the law; of this world's tribunals: but in the case of the Gospel proclamation; when the delinquent has confessed, then is he saved! Observe how Peter does not instantly hurry over this, but he specifies also the conditions, and adds, "Ye shall receive the gift of the Holy Ghost;" an assertion accredited by the fact, that the Apostles themselves had received that gift.

As the mouth of all the apostles put forward, Peter says, Repent and be baptized, not believe, but, "Be baptized." For this is the foundation of those who believe in Christ. Therefore he requires this first, and after this he brings the end toward the foundation, saying "the gift of the Holy Spirit," as revealed through this faith.

Although the question was posed to all the apostles, "Peter" again answers — since the apostles themselves preferred his mouth — and says: "Repent, and let each of you be baptized in the name of Jesus Christ." These words do not contradict the following words of the Gospel: "Baptizing them in the name of the Father and of the Son and of the Holy Spirit" (Matt. 28:19), because the Church confesses the Holy Trinity as undivided, so that, by virtue of the unity of the three hypostases in essence, the one baptized in the name of Christ is baptized into the Trinity, since the Father and the Son and the Holy Spirit are undivided in essence. If the name of the Father were not God, and the name of the Son were not God, and the name of the Holy Spirit were not God, then one would have to say "in the name of God Jesus Christ," or even simply — only "in the Son." But Peter says in the "name of Jesus Christ," knowing that the name of Jesus is God, just as the name of the Father and the name of the Holy Spirit are also God.

He next gives a persuasive turn to his address, adding, "For the promise is unto you": for he had spoken of a promise above. "And to your children," he says: the gift is greater, when these are to be heirs of the blessings. "And to all," he continues, "that are afar off:" if to those that are afar off, much more to you that are near: "even as many as the Lord our God shall call." Observe the time he takes for saying, "To those that are afar off." It is when he finds them conciliated and self-accusing. For when the soul pronounces sentence against itself, no longer can it feel envy.

"The promise," i.e. the gift of the Holy Ghost. So far, he speaks of the easy part, and that which has with it a great gift; and then he leads them to practice: for it will be to them a ground of earnestness, to have tasted already of those so great blessings.

And by saying, "For to you is the promise and to your children and to all who are far off, and to those who are near," he indicates the greatness of the gift, that it is sufficient not only for them but also for their children. And it is bestowed upon the Gentiles as well. For he hinted at this by "those who are far off"; but if to those who are far off, then all the more to you who are near. Consider also that then he hinted at the faith of the Gentiles, when he found them humbled and having judged themselves. For when a soul condemns itself, it is no longer able to envy.

"And you shall receive the gift of the Holy Spirit." Note: Peter showed that the gift of Christ and the gift of the Holy Spirit are one and the same gift, since their dignity is also one and the same. Speaking above, he called this gift a promise, which "belongs to you… and to your children," because a gift is more valuable when the blessings pass also to one's heirs, "and to all who are far off." If this gift is for those who are far off, then all the more so for you who are near. Pay attention to when he pointed out to the Jews the calling of the Gentiles, saying "and to those who are far off." When? When he found them cut to the heart and having come to know themselves. When the soul condemns itself, then it can no longer envy.

"And with many other words did he testify, and exhort, saying." Observe how, throughout, the writer studies brevity, and how free he is from ambition and display. "He testified and exhorted, saying." This is the perfection of teaching, comprising something of fear and something of love. "Save yourselves from this untoward generation." He says nothing of the future, all is about the present, by which indeed men are chiefly swayed; he shows that the Gospel releases from present evils as well.

Since, however, the hearer would desire to learn what was the sum and substance of these further words, he tells us this: "Save yourselves from this untoward generation." They approved of what had been said, although fraught with terror, and after their assent given, proceed at once to baptism.

And about three thousand souls were added that day. Where the baptism of the Church was first celebrated, divine mercy, by careful plan, gathered a number of souls equal to the confession of the Holy Trinity. And Moses indeed, on the fiftieth day of Passover when the law was given, commanded the solemnity of the first fruits to be initiated; but now, with the Holy Spirit coming, not sheaves of wheat, but souls were consecrated as first fruits to the Lord.

Those, therefore, who received his word were baptized. Another translation, according to the accuracy of the Greek truth, has it thus: Those indeed willingly accepting his word were baptized. By this interpretation it seems more clearly expressed that not some of those who had heard Peter's word, but all who had assembled to hear, willingly hearing this, were baptized.

For this reason, too, did the apostles, collecting the sheep which had perished of the house of Israel, and discoursing to them from the Scriptures, prove that this crucified Jesus was the Christ, the Son of the living God; and they persuaded a great multitude, who, however, [already] possessed the fear of God. And there were, in one day, baptized three, and four, and five thousand men.

"Then they that gladly received his word were baptized; and the same day there were added unto them about three thousand souls." Think you not this cheered the Apostles more than the miracle?

They heard, and were forthwith baptized. They did not speak those cold words which we do now, nor did they contrive delays; and yet they had heard all the requirements: but that word, "Save yourselves from this generation," made them to be not sluggish; rather they welcomed the exhortation; and that they did welcome it, they proved by their deeds, they showed what manner of men they were. They entered at once the lists, and took off the coat; whereas we do enter, but we intend to fight with our coat on. This is the cause that our antagonist has so little trouble, for we get entangled in our own movements, and are continually thrown down.

Once there were three thousand - there were five thousand - and yet they had all one soul: but now each knows not his brother, and is not ashamed to lay the blame on the number, because it is so great! Yet he that has many friends is invincible against all men: stronger he than any tyrant.

Here is the fulfillment of the prophecy which says: "Who has heard such a thing? Who has seen such things? Shall a land be born in one day? Shall a nation be brought forth in one moment? For as soon as Zion was in labor, she brought forth her sons" (Is. 66:8).

The only rite which we know to have been instituted by Our Lord Himself is the Holy Communion ('Do this in remembrance of me' - 'If you do not eat the flesh of the Son of Man and drink His blood, ye have no life in you'). This is an order and must be obeyed. The other services are, I take it, traditional and might lawfully be altered. But the New Testament does not envisage solitary religion: some kind of regular assembly for worship and instruction is everywhere taken for granted in the Epistles. So we must be regular practising members of the Church.

Of course we differ in temperament. Some (like you - and me) find it more natural to approach God in solitude: but we must go to church as well. Others find it easier to approach Him through the services: but they must practice private prayer and reading as well. For the Church is not a human society of people united by their natural affinities but the Body of Christ in which all members however different (and He rejoices in their differences and by no means wishes to iron them out) must share the common life, complementing and helping and receiving one another precisely by their differences. (Re-read 1st Corinthians cap 12 and meditate on it. The word translated members would perhaps be better translated organs).

"And they were persevering in the doctrine of the apostles," etc. As those who had converted continued devoutly in the doctrine that they had embraced, and as the apostles frequently performed great miracles, the fear of the Lord and the number of the faithful people increased daily. There was great concord among the believers, such that everyone would sell their own possessions and a brother would unfailingly be provided with whatever he stood in need of. Great also was their devotion to meeting in the temple. They would, too, take their food in simplicity of heart and with thanksgiving. That is why the Lord, favorably inclined towards them, always increased their number. Once, when Peter and John went up to the temple for prayer, they took the hand of a man who had been lame from his mother's womb and made him walk with firm steps. The people, seeing this, were filled with inexpressible wonder, and their eagerness to see more grew greater and greater, with vehement devotion.

But every Lord's day do ye gather yourselves together, and break bread, and give thanksgiving after having confessed your transgressions, that your sacrifice may be pure. But let no one that is at variance with his fellow come together with you, until they be reconciled, that your sacrifice may not be profaned. For this is that which was spoken by the Lord: In every place and time offer to me a pure sacrifice; for I am a great King, saith the Lord, and my name is wonderful among the nations.

"And they continued steadfastly and with one accord in the Apostles' doctrine and fellowship." Here are two virtues, perseverance and concord. "In the Apostles' doctrine," he says: for they again taught them; "and fellowship, and in breaking of bread, and in prayer." All in common, all with perseverance.

"And they continued" it is written, "steadfastly in the doctrine" (or, "teaching") "of the Apostles": for it was not for one day, no nor for two or three days that they were under teaching as being persons who had gone over to a different course of life. "And they continued with one accord in the Apostles' doctrine," etc. The expression is not "together," but "with one accord," ("and daily," he says afterwards, "they were continuing with one accord in the temple,") i.e. with one soul.

And here again in his conciseness, he does not relate the teaching given; for as young children, the Apostles nourished them with spiritual food.

"And fear came upon every soul": of those that believed. For they did not despise the Apostles, like common men, nor did they fix their regard on that which was visible merely. Verily, their thoughts were kindled into a glow. And as Peter had before spoken much, and declared the promises, and the things to come, well might they be beside themselves with fear. The wonders also bore witness to the words: "Many wonders and signs were done by the Apostles." As was the case with Christ; first there were signs, then teaching, then wonders; so was it now.

"And fear came upon every soul": clearly, of those, as well, who did not believe; namely, upon seeing so great a change all at once effected, and besides in consequence of the miracles.

For they did not despise those who happened to be there, but because Peter was a great figure, flowing from above, and showing the things to come by his promises, they were rightly afraid. For the works bore witness to the word. Just as before with Christ there were first signs, then teaching, then miracles, so now also.

"There was... fear on every soul," because they did not disregard what was happening as something accidental. Since Peter was filled with abundant grace and was revealing the promises and the future, it was very natural that they were seized with fear, especially since he confirmed his words with the miracles and signs he performed. As with Christ—first signs, then teaching, then miracles—so also now.