Matthew 13:13-15

13For this reason I speak to them in parables: Although they see they do not see, and although they hear they do not hear nor do they understand.

14And concerning them the prophecy of Isaiah is fulfilled that says: ‘You will listen carefully yet will never understand, you will look closely yet will never comprehend.

15For the heart of this people has become dull; they are hard of hearing, and they have shut their eyes, so that they would not see with their eyes and hear with their ears and understand with their hearts and turn, and I would heal them.’