And the disciples came, and said to him, Why speak you to them in parables? He answered and said to them, Because it is given to you to know the mysteries of the kingdom of heaven, but to them it is not given. For whoever has, to him shall be given, and he shall have more abundance: but whoever has not, from him shall be taken away even that he has. Therefore speak I to them in parables: because they seeing see not; and hearing they hear not, neither do they understand.
– Matthew 13:10-13