Mark 4:10-12

10And when he was alone, they that were about him with the twelve asked of him the parable.

11And he said to them, To you it is given to know the mystery of the kingdom of God: but to them that are outside, all these things are done in parables:

12That seeing they may see, and not perceive; and hearing they may hear, and not understand; lest at any time they should be converted, and their sins should be forgiven them.