John 8:47

“Many will be purged, purified, and refined, but the wicked will act wickedly; and none of the wicked will understand, but those who have insight will understand.

“Truly, truly, I say to you, an hour is coming and now is, when the dead will hear the voice of the Son of God, and those who hear will live.

“But you do not believe because you are not of My sheep.

“He who rejects Me and does not receive My words, has one who judges him; the word I spoke is what will judge him on the last day.

Therefore Pilate said to Him, “So You are a king?” Jesus answered, “You yourself said I am a king. For this I have been born, and for this I have come into the world, to bear witness to the truth. Everyone who is of the truth hears My voice.”

We are from God. The one who knows God hears us; the one who is not from God does not hear us. From this we know the spirit of truth and the spirit of error.