'Spirit of Truth' in the Bible

the Spirit of truth, whom the world cannot receive, because it neither sees him nor knows him; but you know him, for he dwells with you and will be in you.

"But when the Counselor comes, whom I shall send to you from the Father, the Spirit of truth who proceeds from the Father, he will testify of me.

But when he, the Spirit of truth, comes, he will guide you into all truth; for he will not speak on his own authority, but whatever he hears he will speak; and he will tell you things to come.

We are of God. Whoever knows God listens to us; he who is not of God does not listen to us. By this we know the spirit of truth and the spirit of error.