the Helper is the Spirit of truth, whom the world cannot receive, because it does not see Him or know Him; but you know Him because He remains with you and will be in you.

“When the Helper comes, whom I will send to you from the Father, namely, the Spirit of truth who comes from the Father, He will testify about Me,

But when He, the Spirit of truth, comes, He will guide you into all the truth; for He will not speak on His own, but whatever He hears, He will speak; and He will disclose to you what is to come.

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