When he was alone, the Twelve and others who were around him questioned him about the parables. He replied, “To you the secret of the kingdom of God has been given; but to those who are outside, everything comes by way of parables, so that (as Scripture says) they may look and look, but see nothing; they may hear and hear, but understand nothing; otherwise they might turn to God and be forgiven.”
(Mark 4:10-12; NEB)