'Spirit of Truth' in the Bible

which is the spirit of truth whom the world cannot receive; because the world seeth him not, neither knoweth him. But ye know him. For he dwelleth with you, and shall be in you.

"But when the comforter is come, whom I will send unto you from the father, which is the spirit of truth which proceedeth of the father, he shall testify of me.

Howbeit, when he is once come - I mean the spirit of truth - he will lead you into all truth. He shall not speak of himself: but whatsoever he shall hear, that shall he speak; and he will show you things to come.

We be of God, and he that knoweth God heareth us: and he that is not of God, heareth us not. And hereby know we the spirit of truth, and the spirit of error.