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1凡信耶穌是基督的，都是從 神而生，凡愛生他之 神的，也必愛從 神生的。Everyone who believes that Jesus is the Christ has been born of God, and everyone who loves the Father also loves those born of Him.
2我們若愛 神，又遵守他的誡命，從此就知道我們愛 神的兒女。By this we know that we love the children of God: when we love God and keep His commandments.
3我們遵守 神的誡命，這就是愛他了，並且他的誡命不是。For this is the love of God, that we keep His commandments. And His commandments are not burdensome,
4因為凡從 神生的，就世界；使我們勝了世界的，就是我們的信心。because everyone born of God overcomes the world. And this is the victory that has overcome the world: our faith.
5勝過世界的是誰呢？不是那信耶穌是 神兒子的嗎？Who then overcomes the world? Only he who believes that Jesus is the Son of God.
6這藉著而來的，就是耶穌基督；不是單用水，乃是用水又用血，This is the One who came by water and blood, Jesus Christ—not by water alone, but by water and blood. And it is the Spirit who testifies to this, because the Spirit is the truth.
7並且有作見證，因為聖靈就是真理。For there are three that testify:
8作見證的原來有三：就是聖靈、水，與血，這三樣也都歸於一。the Spirit, the water, and the blood—and these three are in agreement.
9我們既領受人的見證， 神的見證更該領受（該領受：原文是大）了，因 神的見證是為他兒子作的。Even if we accept human testimony, the testimony of God is greater. For this is the testimony that God has given about His Son.
10信 神兒子的，就有這見證在他心裡；不信 神的，就是將 神當作，因不信 神為他兒子作的見證。Whoever believes in the Son of God has this testimony within him; whoever does not believe God has made Him out to be a liar, because he has not believed in the testimony that God has given about His Son.
11這見證就是 神賜給我們永生；這永生也是在他兒子裡面。And this is that testimony: God has given us eternal life, and this life is in His Son.
12人有了 神的兒子就有生命，沒有 神的兒子就沒有生命。Whoever has the Son has life; whoever does not have the Son of God does not have life.
13我將這些話寫給你們信奉 神兒子之名的人，要叫你們知道自己有永生。I have written these things to you who believe in the name of the Son of God, so that you may know that you have eternal life.
14我們若照他的旨意求甚麼，他就聽我們，這是我們向他所存坦然無懼的心。And this is the confidence that we have before Him: If we ask anything according to His will, He hears us.
15既然知道他聽我們一切所求的，就知道我們所求於他的，無不得著。And if we know that He hears us in whatever we ask, we know that we already possess what we have asked of Him.
16人若看見弟兄犯了不，就當為他祈求， 神必將生命賜給他；有至於死的罪，我不說當為這罪祈求。If anyone sees his brother committing a sin not leading to death, he should ask God, who will give life to those who commit this kind of sin. There is a sin that leads to death; I am not saying he should ask regarding that sin.
17凡不義的事都是罪，也有不至於死的罪。All unrighteousness is sin, yet there is sin that does not lead to death.
18我們知道凡從 神生的，必不犯罪，從 神生的，必（有古卷：那從 神生的必保護他），那惡者也就無法害他。We know that anyone born of God does not keep on sinning; the One who was born of God protects him, and the evil one cannot touch him.
19我們知道，我們是屬 神的，全世界都那惡者手下。We know that we are of God, and that the whole world is under the power of the evil one.
20我們也知道， 神的兒子已經來到，且將賜給我們，使我們認識那位真實的，我們也在那位真實的裡面，就是在他兒子耶穌基督裡面。這是，也是永生。And we know that the Son of God has come and has given us understanding, so that we may know Him who is true; and we are in Him who is true—in His Son Jesus Christ. He is the true God and eternal life.
21小子們哪，你們要，遠避！Little children, keep yourselves from idols.