3:1 - Behold, what manner of love the Father has bestowed upon us, that we should be called the sons of God: therefore the world knows us not, because it knew him not.
Lactantius Divine Institutes Book VI
But if this is done by those who do not know the truth, how much more ought we to do it, who are able to give true precepts,[14]
3:2 - Beloved, now are we the sons of God, and it does not yet appear what we shall be: but we know that, when he shall appear, we shall be like him; for we shall see him as he is.
Tertullian On the Resurrection of the Flesh
In like manner John says: "And it doth not yet appear what we shall be: we know, however, that when He shall be manifest, we shall be like Him."[154]Origen de Principiis Book III
Now, that such is the case, the Apostle John points out more clearly and unmistakeably, when he makes this declaration: "Little children, we do not yet know what we shall be; but if a revelation be made to us from the Saviour, ye will say, without any doubt, we shall be like Him."[405]Origen Against Celsus Book IV
And, lastly, because "it doth not yet appear what we shall be; but we know that when He shall appear, we shall be like God, and shall see Him as He is."[121]
3:3 - And every man that has this hope in him purifies himself, even as he is pure.
Tertullian On Monogamy
Accordingly he says more manifestly: "And every (man) who hath this hope in Him maketh himself chaste, just as Himself withal is chaste."[16]Tertullian On Modesty
and accordingly, "he who is being born of God doeth not sin, because the seed of God abideth in him; and he cannot sin, because he hath been born of God. Herein are manifest the sons of God and the sons of the devil."[249]
3:7 - Little children, let no man deceive you: he that does righteousness is righteous, even as he is righteous.
Epistle of Ignatius to the Ephesians
are of God, while all other things which are requisite for a holy life follow after them. No man [truly] making a profession of faith sinneth;[99]
3:9 - Whosoever is born of God does not commit sin; for his seed remains in him: and he cannot sin, because he is born of God.
Shepherd of Hermas Commandment Fourth
And therefore I say to you, that if any one is tempted by the devil, and sins after that great and holy calling. in which the Lord has called His people to everlasting life,[13]
3:10 - In this the children of God are manifest, and the children of the devil: whosoever does not righteousness is not of God, neither he that loves not his brother.
Tertullian On Modesty
is not of God,"[250]Dubious Hippolytus Fragments
and the beloved of Christ, in harmony with him, cries, "The children of the devil are manifest;[34]Cyprian Treatise XII Three Books of Testimonies Against the Jews
For he who hateth his brother is a murderer; and ye know that no murderer hath eternal life abiding in him."[381]
3:14 - We know that we have passed from death unto life, because we love the brethren. He that loves not his brother abides in death.
Shepherd of Hermas Similitude Sixth
These have been perverted from the truth: among them there is the hope of repentance, by which it is possible to live. Corruption, then, has a hope of a kind of renewal,[7]Clement of Alexandria Who is the Rich Man that Shall Be Saved?
And if we owe our lives to the brethren, and have made such a mutual compact with the Saviour, why should we any more hoard and shut up worldly goods, which are beggarly, foreign to us and transitory? Shall we shut up from each other what after a little shall be the property of the fire? Divinely and weightily John says," He that loveth not his brother is a murderer,"[67]
3:15 - Whosoever hates his brother is a murderer: and all of you know that no murderer has eternal life abiding in him.
Tertullian On Idolatry
even in a word of curse or of reproach, and in every impulse of anger, and in the neglect of charity toward a brother just as John teaches,[8]Cyprian Treatise X On Jealousy and Envy
e darkness of jealousy? why do you enfold yourself in the cloud of malice? why do you quench all the light of peace and charity in the blindness of envy? why do you return to the devil, whom you had renounced? why do you stand like Cain? For that he who is jealous of his brother, and has him in hatred, is bound by the guilt of homicide, the Apostle John declares in his epistle, saying, "Whosoever hateth his brother is a murderer; and ye know that no murderer hath life abiding in him."[24]
3:16 - Hereby perceive we the love of God, because he laid down his life for us: and we ought to lay down our lives for the brethren.
Tertullian Scorpiace
John, in fact, exhorts us to lay down our lives even for our brethren,[81]Tertullian De Fuga in Persecutione
too, that ye may be able to quench the darts of the devil, when doubtless ye resist him, and sustain his assaults in their utmost force. Accordingly John also teaches that we must lay down our lives for the brethren;[40]
3:18 - My little children, let us not love in word, neither in tongue; but in deed and in truth.
Clement of Alexandria Stromata Book IV
"Little children, let us not love in word, or in tongue," says John, teaching them to be perfect, "but in deed and in truth; hereby shall we know that we are of the truth."[143]
3:19 - And hereby we know that we are of the truth, and shall assure our hearts before him.
Shepherd of Hermas Commandment Third
How then can I live, since I have acted thus? "And he said to me, "Your feelings are indeed right and sound, for you ought as a servant of God to have walked in truth, and not to have joined an evil conscience with the spirit of truth, nor to have caused sadness to the holy and true Spirit."[5]
3:20 - For if our heart condemn us, God is greater than our heart, and knows all things.
Tertullian A Treatise on the Soul
and John says, "By his own heart is each man condemned; "[103]