'Truth' in the Bible

If we say that we have fellowship with him and walk in the darkness, we lie, and don't tell the truth.

If we say that we have no sin, we deceive ourselves, and the truth is not in us.

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

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.

My little children, let's not love in word only, neither with the tongue only, but in deed and truth.

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

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.

This is he who came by water and blood, Jesus Christ; not with the water only, but with the water and the blood. It is the Spirit who testifies, because the Spirit is the truth.