'Know' in the Bible

This is how we know that we know him: if we keep his commandments.

One who says, "I know him," and doesn't keep his commandments, is a liar, and the truth isn't in him.

But whoever keeps his word, God's love has most certainly been perfected in him. This is how we know that we are in him:

But he who hates his brother is in the darkness, and walks in the darkness, and doesn't know where he is going, because the darkness has blinded his eyes.

I write to you, fathers, because you know him who is from the beginning. I write to you, young men, because you have overcome the evil one. I write to you, little children, because you know the Father.

I have written to you, fathers, because you know him who is from the beginning. I have written to you, young men, because you are strong, and the word of God remains in you, and you have overcome the evil one.

Little children, these are the end times, and as you heard that the Antichrist is coming, even now many antichrists have arisen. By this we know that it is the final hour.

I have not written to you because you don't know the truth, but because you know it, and because no lie is of the truth.

If you know that he is righteous, you know that everyone who practices righteousness is born of him.

Behold, how great a love the Father has bestowed on us, that we should be called children of God! For this cause the world doesn't know us, because it didn't know him.

Beloved, now we are children of God, and it is not yet revealed what we will be. But we know that, when he is revealed, we will be like him; for we will see him just as he is.

You know that he was revealed to take away our sins, and in him is no sin.

We know that we have passed out of death into life, because we love the brothers. He who doesn't love his brother remains in death.

Whoever hates his brother is a murderer, and you know that no murderer has eternal life remaining in him.

By this we know love, because he laid down his life for us. And we ought to lay down our lives for the brothers.

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

He who keeps his commandments remains in him, and he in him. By this we know that he remains in us, by the Spirit which he gave us.

By this you know the Spirit of God: every spirit who confesses that Jesus Christ has come in the flesh is of God,

We are of God. He who knows God listens to us. He who is not of God doesn't listen to us. By this we know the spirit of truth, and the spirit of error.

He who doesn't love doesn't know God, for God is love.

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

We know and have believed the love which God has for us. God is love, and he who remains in love remains in God, and God remains in him.

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

These things I have written to you who believe in the name of the Son of God, that you may know that you have eternal life, and that you may continue to believe in the name of the Son of God.

And if we know that he listens to us, whatever we ask, we know that we have the petitions which we have asked of him.

We know that whoever is born of God doesn't sin, but he who was born of God keeps himself, and the evil one doesn't touch him.

We know that we are of God, and the whole world lies in the power of the evil one.

We know that the Son of God has come, and has given us an understanding, that we know him who is true, and we are in him who is true, in his Son Jesus Christ. This is the true God, and eternal life.