1论到从太初就已经存在的生命之道，我们曾经耳闻目睹，亲眼看过，亲手摸过。 2这生命曾显现过，我们看见了，现在做见证，向你们传扬这原本与父同在、曾向我们显现的永恒生命。 3我们把所见所闻传给你们，使你们可以与我们相交。诚然，我们是与父和祂儿子耶稣基督相交。 4我们将这些话写给你们，是要让大家都充满喜乐。
5我们从耶稣那里听见、现在传给你们的信息就是：上帝是光，在祂里面毫无黑暗。 6如果我们说与祂相交，却仍过着黑暗的生活，就是撒谎，没有遵行真理。 7如果我们生活在光明之中，像上帝在光明中一样，就能够彼此相交，上帝儿子耶稣的血能洗净我们一切的罪。
8如果我们说自己没有罪，便是自欺，真理就不在我们心中。 9如果我们承认自己的罪，上帝是信实公义的，必赦免我们的罪，洗净我们一切的不义。 10我们如果说自己没有犯过罪，就是把上帝看作说谎的，祂的道也不在我们心中。
The Incarnation of the Word of Life
1That which was from the beginning, which we have heard, which we have seen with our eyes, which we have looked at and our hands have touched—this we proclaim concerning the Word of life. 2The life appeared; we have seen it and testify to it, and we proclaim to you the eternal life, which was with the Father and has appeared to us. 3We proclaim to you what we have seen and heard, so that you also may have fellowship with us. And our fellowship is with the Father and with his Son, Jesus Christ. 4We write this to make our1:4 Some manuscripts your joy complete.
Light and Darkness, Sin and Forgiveness
5This is the message we have heard from him and declare to you: God is light; in him there is no darkness at all. 6If we claim to have fellowship with him and yet walk in the darkness, we lie and do not live out the truth. 7But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus, his Son, purifies us from all1:7 Or every sin.
8If we claim to be without sin, we deceive ourselves and the truth is not in us. 9If we confess our sins, he is faithful and just and will forgive us our sins and purify us from all unrighteousness. 10If we claim we have not sinned, we make him out to be a liar and his word is not in us.