The next day he saw Jesus coming towards him and declared, "Here is the Lamb Of God who takes away the sin of the world. This is whom I said, "After he comes a man who ranks ahead of me because he was before me" I myself did not know him; but I came baptizing me with water for this reason, that he might be revealed to Israel". And John testified, I saw the Spirit descending from heaven like a dove, and it remained on him. I myself did not know him, but the one who sent me to baptize with water said to me, "He on whom you see who baptizes with the Holy Spirit". And I myself have seen and have testified that this is the Son of God
Do we always have to see to believe?