17 distinct Greek words appear in this verse.

2 variant units attested by manuscript witnesses and modern critical editions.

• Faith
• Love
• Obedience and Disobedience

5 passages from patristic writers, Reformers, and church catechisms citing this verse.

• 1John 2:7 — Brethren, I write no new commandment unto you, but an old commandment which ye had from the beginning. The old commandment is the word which ye have heard from the beginning.
• 1John 2:8 — Again, a new commandment I write unto you, which thing is true in him and in you: because the darkness is past, and the true light now shineth.
• 1John 3:11 — For this is the message that ye heard from the beginning, that we should love one another.
• 1John 3:14 — We know that we have passed from death unto life, because we love the brethren. He that loveth not his brother abideth in death.
• 1John 3:22 — And whatsoever we ask, we receive of him, because we keep his commandments, and do those things that are pleasing in his sight.
• 1John 4:11 — Beloved, if God so loved us, we ought also to love one another.
• 1John 4:21 — And this commandment have we from him, That he who loveth God love his brother also.
• 1John 4:21 — And this commandment have we from him, That he who loveth God love his brother also.
• 1John 5:13 — These things have I written unto you that believe on the name of the Son of God; that ye may know that ye have eternal life, and that ye may believe on the name of the Son of God.
• 1Pet 1:22 — Seeing ye have purified your souls in obeying the truth through the Spirit unto unfeigned love of the brethren, see that ye love one another with a pure heart fervently:
• 1Pet 1:22 — Seeing ye have purified your souls in obeying the truth through the Spirit unto unfeigned love of the brethren, see that ye love one another with a pure heart fervently:
• 1Pet 4:8 — And above all things have fervent charity among yourselves: for charity shall cover the multitude of sins.
• 1Thess 4:9 — But as touching brotherly love ye need not that I write unto you: for ye yourselves are taught of God to love one another.
• 1Thess 4:9 — But as touching brotherly love ye need not that I write unto you: for ye yourselves are taught of God to love one another.
• 1Tim 1:5 — Now the end of the commandment is charity out of a pure heart, and of a good conscience, and of faith unfeigned:
• 2John 1:5 — And now I beseech thee, lady, not as though I wrote a new commandment unto thee, but that which we had from the beginning, that we love one another.
• Acts 16:31 — And they said, Believe on the Lord Jesus Christ, and thou shalt be saved, and thy house.
• Col 1:4 — Since we heard of your faith in Christ Jesus, and of the love which ye have to all the saints,
• Deut 18:15 — The LORD thy God will raise up unto thee a Prophet from the midst of thee, of thy brethren, like unto me; unto him ye shall hearken;
• Deut 18:15 — The LORD thy God will raise up unto thee a Prophet from the midst of thee, of thy brethren, like unto me; unto him ye shall hearken;
• Deut 30:15 — See, I have set before thee this day life and good, and death and evil;
• Eph 5:2 — And walk in love, as Christ also hath loved us, and hath given himself for us an offering and a sacrifice to God for a sweetsmelling savour.
• Eph 5:2 — And walk in love, as Christ also hath loved us, and hath given himself for us an offering and a sacrifice to God for a sweetsmelling savour.
• Gal 3:22 — But the scripture hath concluded all under sin, that the promise by faith of Jesus Christ might be given to them that believe.
• Heb 13:1 — Let brotherly love continue.
• John 1:12 — But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name:
• John 6:29 — Jesus answered and said unto them, This is the work of God, that ye believe on him whom he hath sent.
• John 6:29 — Jesus answered and said unto them, This is the work of God, that ye believe on him whom he hath sent.
• John 13:34 — A new commandment I give unto you, That ye love one another; as I have loved you, that ye also love one another.
• John 13:34 — A new commandment I give unto you, That ye love one another; as I have loved you, that ye also love one another.
• John 15:12 — This is my commandment, That ye love one another, as I have loved you.
• John 15:12 — This is my commandment, That ye love one another, as I have loved you.
• John 16:14 — He shall glorify me: for he shall receive of mine, and shall shew it unto you.
• John 17:3 — And this is life eternal, that they might know thee the only true God, and Jesus Christ, whom thou hast sent.
• Mark 9:7 — And there was a cloud that overshadowed them: and a voice came out of the cloud, saying, This is my beloved Son: hear him.
• Matt 12:50 — For whosoever shall do the will of my Father which is in heaven, the same is my brother, and sister, and mother.
• Matt 22:39 — And the second is like unto it, Thou shalt love thy neighbour as thyself.
• Ps 2:12 — Kiss the Son, lest he be angry, and ye perish from the way, when his wrath is kindled but a little. Blessed are all they that put their trust in him.
• Rev 2:26 — And he that overcometh, and keepeth my works unto the end, to him will I give power over the nations:
• Rev 22:14 — Blessed are they that do his commandments, that they may have right to the tree of life, and may enter in through the gates into the city.