Everyone who keeps living in sin also practices disobedience. In fact, sin is disobedience.

We know that we have passed out of death into Life, because we love the brothers and sisters. He who does not love remains in [spiritual] death.

We know what love means from the fact that he laid down his life for us; so we also ought to lay down our lives for our brothers.

By this you know and recognize the Spirit of God: every spirit that acknowledges and confesses [the fact] that Jesus Christ has [actually] come in the flesh [as a man] is from God [God is its source];

We can know that we are continuing in union with Him and that He is continuing in union with us, by the fact that He has given us a portion of His Spirit.

Moreover, our eyes have seen--and we are testifying to the fact--that the Father has sent the Son to be the Savior of the world.

And, moreover, we have learned to know, and have accepted as a fact, the love which God has for us. God is Love; and he who lives in love lives in God, and God in him.

Everyone who believes [with a deep, abiding trust in the fact] that Jesus is the Christ (the Messiah, the Anointed) is born of God [that is, reborn from above—spiritually transformed, renewed, and set apart for His purpose], and everyone who loves the Father also loves the child born of Him.

The fact that we love God Himself, and obey His commands, is a proof that we love God's children.

Who is the one who is victorious and overcomes the world? It is the one who believes and recognizes the fact that Jesus is the Son of God.

We accept the testimony of men, but God's testimony is still stronger; and there is the testimony of God--the fact that he has already borne testimony about his Son.

We know that no child of God commits sin, but the fact that he is God's child protects him, and the evil one cannot touch him.