Everyone who believes that Jesus is the Christ has been born of God, and everyone who loves the Father loves whoever has been born of him. By this we know that we love the children of God: when we love God and keep his commandments. They are not burdensome, for everyone born of God overcomes the world, and this is the victory: our faith. The one who overcomes believes that Jesus is the Son of God (vv. 1-5).
Jesus Christ came by water and blood, not by the water only but by the water and the blood, and the Spirit testifies to it because the Spirit is the truth. Three testify, the Spirit, the water and the blood, and they agree. If we accept the testimony of men, God's testimony concerning his Son is greater. Whoever believes in the Son has the testimony in himself. This is the testimony: God gave us eternal life, and this life is in his Son. Whoever has the Son has life; whoever does not have the Son does not have life (vv. 6-12).
John writes these things to those who believe in the name of the Son of God so that they may know they have eternal life. This is the confidence we have toward him: if we ask anything according to his will he hears us, and we know that we have what we asked of him. If anyone sees his brother committing a sin not leading to death, he will ask and God will give him life; there is a sin that leads to death, but not all wrongdoing is of that kind (vv. 13-17).
We know that everyone born of God does not keep on sinning, for the Son of God protects him and the evil one does not touch him. We are from God, and the whole world lies in the power of the evil one. The Son of God has come and given us understanding to 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. Little children, keep yourselves from idols (vv. 18-21).