An unbeliever is NOT on the side of truth. They are in darkness. In John 18:37 Jesus is speaking of Jews who had faith in God the Father (Yahweh, IAM,)already. THEY are the ones who would recognize the Messiah because God would open their eyes to Him. They are the sheep. The self righteous would remain in darkness.
I gave you other scriptures not just about the Old Testament people. I gave you many scriptures telling you that the message is POWER; it is the WORD OF GOD. There is NO other message in the world like it. There is NO other name in which we are to be saved. No other religion, no other gods, or goddesses have a message that saves.
There is no such thing in the Bible that says God supernaturally causes us to believe! The Bible says we believe THEN we receive the Holy Spirit. I give you the word of God but you do not accept it.