Matthew 13:10-15

The disciples approached him and said, “Why do you speak to them in parables?” He said to them in reply, “Because knowledge of the mysteries of the kingdom of heaven has been granted to you, but to them it has not been granted. To anyone who has, more will be given and he will grow rich; from anyone who has not, even what he has will be taken away. This is why I speak to them in parables, because ‘they look but do not see and hear but do not listen or understand.’ Isaiah’s prophecy is fulfilled in them, which says: ‘You shall indeed hear but not understand, you shall indeed look but never see. Gross is the heart of this people, they will hardly hear with their ears, they have closed their eyes, lest they see with their eyes and hear with their ears and understand with their heart and be converted, and I heal them.’ The Privilege of Discipleship.