They asked him, "Why then do you baptize, if you are not the Christ, nor Elijah, nor the Prophet?"

 In the time of John there was a kind of heresy called Gnosticism. Its characteristic was that it was an intellectual and philosophical approach to Christianity. To the Gnostics the simple beliefs of the ordinary Christian were not enough. They tried to construct a philosophic system out of Christianity. They were troubled about the existence of sin and evil and sorrow and suffering in this world, so they worked out a theory to explain it. The theory was this. 