13 Therefore I speak to them in parables, because seeing they do not see, and hearing they do not hear, nor do they understand.
14 And in them is fulfilled the prophecy of Isaiah, which says: 'Hearing you shall hear and by no means understand, and seeing you shall see and by no means perceive.
15 For the heart of this people has become dull, and their ears are hard of hearing, and their eyes have closed, lest they should see with their eyes, and hear with their ears, lest they should understand with their hearts and turn back, that I should heal them.'