And these things we write to you, that your joy may be full.

And by this we do know that we know him, if we keep his commandments.

But whoever keepeth his word, in him verily is the love of God perfected: by this we know that we are in him.

Little children, it is the last time: and as ye have heard that antichrist cometh, even now are there many antichrists; by which we know that it is the last time.

They went out from us, but they were not of us; for if they had been of us, they would no doubt have continued with us: but they went out, that they might be made manifest that they were not all of us.

And now, little children, abide in him; that when he shall appear, we may have confidence, and not be ashamed before him at his coming.

Behold, what manner of love the Father hath bestowed upon us, that we should be called the sons of God: therefore the world knoweth us not, because it knew him not.

Beloved, now are we the sons of God, and it doth not yet appear what we shall be: but we know that, when he shall appear, we shall be like him; for we shall see him as he is.

By this we perceive the love of God, because he laid down his life for us: and we ought to lay down our lives for the brethren.

And by this we know that we are of the truth, and shall assure our hearts before him.

And he that keepeth his commandments, dwelleth in him, and he in him. And by this we know that he abideth in us, by the Spirit which he hath given us.

By this ye know the Spirit of God: Every spirit that confesseth that Jesus Christ hath come in the flesh, is from God:

We are of God. He that knoweth God, heareth us; he that is not of God, heareth not us. By this we know the spirit of truth, and the spirit of error.

In this is love, not that we loved God, but that he loved us, and sent his Son to be the propitiation for our sins.

By this we know that we dwell in him, and he in us, because he hath given us of his Spirit.

And we have seen and do testify, that the Father sent the Son to be the Savior of the world.

Whoever believeth that Jesus is the Christ, is born of God: and every one that loveth him that begat, loveth him also that is begotten by him.

By this we know that we love the children of God, when we love God, and keep his commandments.

This is he that came by water and blood, even Jesus Christ; not by water only, but by water and blood. And it is the Spirit that beareth testimony, because the Spirit is truth.