'Truth' in the Bible

If we say that we have fellowship with him, and walk in darkness, we lie, and do not the truth:

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

He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him.

But you have an anointing from the Holy One [you have been set apart, specially gifted and prepared by the Holy Spirit], and all of you know [the truth because He teaches us, illuminates our minds, and guards us from error].

I have not written unto you because ye know not the truth, but because ye know it, and that no lie is of the truth.

But the anointing which ye have received of him abideth in you, and ye need not that any man teach you: but as the same anointing teacheth you of all things, and is truth, and is no lie, and even as it hath taught you, ye shall abide in him.

My little children, let us not love in word, neither in tongue; but in deed and in truth.

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

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

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 witness, because the Spirit is truth.

For there are three that testify: