110-165 AD Martyr "As many as are persuaded and believe that what we teach and say is true, and undertake to be able to live accordingly, are instructed to pray and to entreat God with fasting, for the remission of their sins that are past, we praying and fasting with them. Then they are brought by us where there is water, and are regenerated in the same manner in which we were ourselves regenerated. For, in the name of God, the Father and Lord of the universe, and of our Savior Jesus Christ, and of the Holy Spirit, they then receive the washing with water. For Christ also said, 'Except ye be born again, ye shall not enter into the kingdom of heaven.' Now, that it is impossible for those who have once been born to enter into their mothers' wombs, is manifest to all... And for this we have learned from the apostles this reason. Since at our birth we were born without our own knowledge or choice, by our parents coming together, and were brought up in bad habits and wicked training; in order that we may not remain the children of necessity and of ignorance, but may become the children of choice and knowledge, and may obtain in the water the remission of sins formerly committed, there is pronounced over him who chooses to be born again, and has repented of his sins, the name of God the Father and Lord of the universe." (Justin Martyr, "First Apology," Ante-Nicene Fathers, vol. 1, pg. 183)
110-165 AD Martyr The "Constitutions of the Holy Apostles" also refer to John 3:5. There, the one who refuses to be baptized is to be condemned as an unbeliever, partially on the basis of what Jesus told Nicodemus…. "He that, out of contempt, will not be baptized, shall be condemned as an unbeliever, and shall be reproached as ungrateful and foolish. For the Lord says: 'Except a man be baptized of water and of the Spirit, he shall by no means enter into the kingdom of heaven.' And again: 'He that believeth and is baptized shall be saved but he that believeth not shall be damned.'" (Justin Martyr "Constitutions of the Holy Apostles," Ante-Nicene Fathers, vol. 7, pg. 456-457.)
110-165AD Martyr "there is no other way [to obtain God's promises] than this-to become acquainted with Christ, to be washed in the fountain spoken of by Isaiah for the remission of sins, and for the remainder, to live sinless lives." (Justin Martyr, Trypho chap. 44)
110-165AD Martyr "Those who are convinced that what we teach is true and who desire to live accordingly are instructed to fast and to pray to God for the remission of all their past sins. We also pray and fast with them. Then we bring them to a place where there is water, and they are regenerated in the same manner in which we ourselves were regenerated. They then receive the washing with water in the name of God (the Father and Lord of the universe) and of our Savior Jesus Christ, and of the Holy Spirit. For Christ said, 'Unless you are born again, you shall not enter into the kingdom of heaven"' [John 3:5]. (Justin First Apology chant 61)
115-188 THEOPHILUS "On the fifth day the living creatures which proceed from the waters were produced, through which also is revealed the manifold wisdom of God in these things; for who could count their multitude and various kinds? Moreover, the things proceeding from the waters were blessed by God, that this also might be a sign of men's being destined to receive repentance and remission of sins, through the water and laver of regeneration, as many as come to the truth, and are born again, and receive blessing from God." (Theophilus, "To Autolycus,", Ante-Nicene Fathers, vol. 2, pg. 101)
115AD Second Clement "For, if we do the will of Christ, we shall find rest; but if otherwise, then nothing shall deliver us from eternal punishment, if we should disobey His commandments. . . . [W]ith what confidence shall we, if we keep not our baptism pure and undefiled, enter into the kingdom of God? Or who shall be our advocate, unless we be found having holy and righteous works?' (Second Clement 6:7)
120-205 AD IRENAEUS "As we are lepers in sin, we are made clean from our old transgressions by means of the sacred water and the invocation of the Lord. We are thus spiritually regenerated as newborn infants, even as the Lord has declared: 'Except a man be born again through water and the Spirit, he shall not enter into the kingdom of heaven.'" Irenaeus, "Fragments From Lost Writings", no. 34, Ante-Nicene Fathers, vol. 1, pg. 574)
120-205 AD IRENAEUS "This class of men have been instigated by Satan to a denial of that baptism which is regeneration to God, and thus to a renunciation of the whole faith." (Against Heresies, bk. 1, chap. 21, sec. 1, Ante-Nicene Fathers, vol. 1, pg. 345.)
140-230 AD TERTULLIAN "After the world had been hereupon set in order through its elements, when inhabitants were given it, 'the waters' were the first to receive the precept 'to bring forth living creatures.' Water was the first to produce that which had life, that it might be no wonder in baptism if waters know how to give life." (Tertullian, "On Baptism," Ante-Nicene Fathers, vol. 3, page 670)
140-230 AD Tertullian "Baptism itself is a corporal act by which we are plunged into the water, while its effect is spiritual, in that we are freed from our sins" (Baptism 7:2).
140-230 AD TERTULLIAN "But they roll back an objection from that apostle himself, in that he said, 'For Christ sent me not to baptize;' as if by this argument baptism were done away! For if so, why did he baptize Gaius, and Crispus, and the house of Stephanas? However, even if Christ had not sent him to baptize, yet He had given other apostles the precept to baptize. But these words were written to the Corinthians in regard of the circumstances of that particular time; seeing that schisms and dissensions were agitated among them, while one attributes everything to Paul, another to Apollos. For which reason the 'peacemaking' apostle, for fear he should seem to claim all gifts for himself, says that he had been sent 'not to baptize, but to preach.' For preaching is the prior thing, baptizing the posterior. Therefore the preaching came first: but I think baptizing withal was lawful to him to whom preaching was." (Tertullian, "On Baptism," Ante-Nicene Fathers, vol. 3, pg. 676)
140-230 AD TERTULLIAN "Happy is our sacrament of water, in that, by washing away the sins of our early blindness, we are set free and admitted into eternal life! A treatise on this matter will not be superfluous; instructing not only such as are just becoming formed in the faith... The consequence is, that a viper of the Cainite heresy, lately conversant in this quarter, has carried away a great number with her most venomous doctrine, making it her first aim to destroy baptism. Which is quite in accordance with nature; for vipers and asps and serpents themselves generally do affect arid and waterless places. But we, little fishes after the example of our ikhthus, Jesus Christ, are born in water, nor have we safety in any other way than by permanently abiding in water; so that most monstrous creature, who had no right to teach even sound doctrine, knew full well how to kill the little fishes, by taking them away from the water!" (On Baptism, Ante-Nicene Fathers, vol. 3, pg. 669.)
140-230 AD TERTULLIAN "How mighty is the grace of water, in the sight of God and His Christ, for the confirmation of baptism! Never is Christ without water: if, that is, He is Himself baptized in water; inaugurates in water the first rudimentary displays of his power, when invited to the wedding; invites the thirsty, when He makes a discourse, to Himself being living water; approves, when teaching concerning love, among works of charity, the cup of water offered to a poor child; recruits His strength at a well; walks over the water; willingly crosses the sea; ministers water to his disciples. Onward even to the passion does the witness of baptism last: while He is being surrendered to the cross, water intervenes; witness Pilate's hands: when He is wounded, forth from His side bursts water; witness the soldier's lance!... True and stable faith is baptized with water, unto salvation; pretended and weak faith is baptized with fire, unto judgment." (Tertullian, "On Baptism," Ante-Nicene Fathers, vol. 3, pg. 673, 674)
140-230 AD TERTULLIAN "The prescript is laid down that 'without baptism, salvation is attainable by none' chiefly on the ground of that declaration of the Lord, who says, 'Unless one be born of water, he hath not life.'" (On Baptism, Ante-Nicene Fathers, vol. 3, pg. 674-675)
140-230 AD TERTULLIAN "What more disgraceful than immodesties? If, moreover, even from a 'brother' who 'walketh idly' he warns the Thessalonians to withdraw themselves, how much more withal from a fornicator! For these are the deliberate judgments of Christ, 'loving the Church,' who 'hath delivered Himself up for her, that He may sanctify her (purifying her utterly by the laver of water) in the word, that He may present the Church to Himself glorious, not having stain or wrinkle' - of course after the laver - 'but that she may be holy and without reproach; thereafter, to wit, being 'without wrinkle' as a virgin, 'without stain' (of fornication) as a spouse, 'without disgrace' (of vileness), as having been 'utterly purified.'" (Tertullian, "On Modesty," 217 AD, Ante-Nicene Fathers, vol. 4, pg. 94)
110-165 AD Martyr The "Constitutions of the Holy Apostles" also refer to John 3:5. There, the one who refuses to be baptized is to be condemned as an unbeliever, partially on the basis of what Jesus told Nicodemus…. "He that, out of contempt, will not be baptized, shall be condemned as an unbeliever, and shall be reproached as ungrateful and foolish. For the Lord says: 'Except a man be baptized of water and of the Spirit, he shall by no means enter into the kingdom of heaven.' And again: 'He that believeth and is baptized shall be saved but he that believeth not shall be damned.'" (Justin Martyr "Constitutions of the Holy Apostles," Ante-Nicene Fathers, vol. 7, pg. 456-457.)
110-165AD Martyr "there is no other way [to obtain God's promises] than this-to become acquainted with Christ, to be washed in the fountain spoken of by Isaiah for the remission of sins, and for the remainder, to live sinless lives." (Justin Martyr, Trypho chap. 44)
110-165AD Martyr "Those who are convinced that what we teach is true and who desire to live accordingly are instructed to fast and to pray to God for the remission of all their past sins. We also pray and fast with them. Then we bring them to a place where there is water, and they are regenerated in the same manner in which we ourselves were regenerated. They then receive the washing with water in the name of God (the Father and Lord of the universe) and of our Savior Jesus Christ, and of the Holy Spirit. For Christ said, 'Unless you are born again, you shall not enter into the kingdom of heaven"' [John 3:5]. (Justin First Apology chant 61)
115-188 THEOPHILUS "On the fifth day the living creatures which proceed from the waters were produced, through which also is revealed the manifold wisdom of God in these things; for who could count their multitude and various kinds? Moreover, the things proceeding from the waters were blessed by God, that this also might be a sign of men's being destined to receive repentance and remission of sins, through the water and laver of regeneration, as many as come to the truth, and are born again, and receive blessing from God." (Theophilus, "To Autolycus,", Ante-Nicene Fathers, vol. 2, pg. 101)
115AD Second Clement "For, if we do the will of Christ, we shall find rest; but if otherwise, then nothing shall deliver us from eternal punishment, if we should disobey His commandments. . . . [W]ith what confidence shall we, if we keep not our baptism pure and undefiled, enter into the kingdom of God? Or who shall be our advocate, unless we be found having holy and righteous works?' (Second Clement 6:7)
120-205 AD IRENAEUS "As we are lepers in sin, we are made clean from our old transgressions by means of the sacred water and the invocation of the Lord. We are thus spiritually regenerated as newborn infants, even as the Lord has declared: 'Except a man be born again through water and the Spirit, he shall not enter into the kingdom of heaven.'" Irenaeus, "Fragments From Lost Writings", no. 34, Ante-Nicene Fathers, vol. 1, pg. 574)
120-205 AD IRENAEUS "This class of men have been instigated by Satan to a denial of that baptism which is regeneration to God, and thus to a renunciation of the whole faith." (Against Heresies, bk. 1, chap. 21, sec. 1, Ante-Nicene Fathers, vol. 1, pg. 345.)
140-230 AD TERTULLIAN "After the world had been hereupon set in order through its elements, when inhabitants were given it, 'the waters' were the first to receive the precept 'to bring forth living creatures.' Water was the first to produce that which had life, that it might be no wonder in baptism if waters know how to give life." (Tertullian, "On Baptism," Ante-Nicene Fathers, vol. 3, page 670)
140-230 AD Tertullian "Baptism itself is a corporal act by which we are plunged into the water, while its effect is spiritual, in that we are freed from our sins" (Baptism 7:2).
140-230 AD TERTULLIAN "But they roll back an objection from that apostle himself, in that he said, 'For Christ sent me not to baptize;' as if by this argument baptism were done away! For if so, why did he baptize Gaius, and Crispus, and the house of Stephanas? However, even if Christ had not sent him to baptize, yet He had given other apostles the precept to baptize. But these words were written to the Corinthians in regard of the circumstances of that particular time; seeing that schisms and dissensions were agitated among them, while one attributes everything to Paul, another to Apollos. For which reason the 'peacemaking' apostle, for fear he should seem to claim all gifts for himself, says that he had been sent 'not to baptize, but to preach.' For preaching is the prior thing, baptizing the posterior. Therefore the preaching came first: but I think baptizing withal was lawful to him to whom preaching was." (Tertullian, "On Baptism," Ante-Nicene Fathers, vol. 3, pg. 676)
140-230 AD TERTULLIAN "Happy is our sacrament of water, in that, by washing away the sins of our early blindness, we are set free and admitted into eternal life! A treatise on this matter will not be superfluous; instructing not only such as are just becoming formed in the faith... The consequence is, that a viper of the Cainite heresy, lately conversant in this quarter, has carried away a great number with her most venomous doctrine, making it her first aim to destroy baptism. Which is quite in accordance with nature; for vipers and asps and serpents themselves generally do affect arid and waterless places. But we, little fishes after the example of our ikhthus, Jesus Christ, are born in water, nor have we safety in any other way than by permanently abiding in water; so that most monstrous creature, who had no right to teach even sound doctrine, knew full well how to kill the little fishes, by taking them away from the water!" (On Baptism, Ante-Nicene Fathers, vol. 3, pg. 669.)
140-230 AD TERTULLIAN "How mighty is the grace of water, in the sight of God and His Christ, for the confirmation of baptism! Never is Christ without water: if, that is, He is Himself baptized in water; inaugurates in water the first rudimentary displays of his power, when invited to the wedding; invites the thirsty, when He makes a discourse, to Himself being living water; approves, when teaching concerning love, among works of charity, the cup of water offered to a poor child; recruits His strength at a well; walks over the water; willingly crosses the sea; ministers water to his disciples. Onward even to the passion does the witness of baptism last: while He is being surrendered to the cross, water intervenes; witness Pilate's hands: when He is wounded, forth from His side bursts water; witness the soldier's lance!... True and stable faith is baptized with water, unto salvation; pretended and weak faith is baptized with fire, unto judgment." (Tertullian, "On Baptism," Ante-Nicene Fathers, vol. 3, pg. 673, 674)
140-230 AD TERTULLIAN "The prescript is laid down that 'without baptism, salvation is attainable by none' chiefly on the ground of that declaration of the Lord, who says, 'Unless one be born of water, he hath not life.'" (On Baptism, Ante-Nicene Fathers, vol. 3, pg. 674-675)
140-230 AD TERTULLIAN "What more disgraceful than immodesties? If, moreover, even from a 'brother' who 'walketh idly' he warns the Thessalonians to withdraw themselves, how much more withal from a fornicator! For these are the deliberate judgments of Christ, 'loving the Church,' who 'hath delivered Himself up for her, that He may sanctify her (purifying her utterly by the laver of water) in the word, that He may present the Church to Himself glorious, not having stain or wrinkle' - of course after the laver - 'but that she may be holy and without reproach; thereafter, to wit, being 'without wrinkle' as a virgin, 'without stain' (of fornication) as a spouse, 'without disgrace' (of vileness), as having been 'utterly purified.'" (Tertullian, "On Modesty," 217 AD, Ante-Nicene Fathers, vol. 4, pg. 94)