Cross reference
Psalms 135:16
16 They have mouths, but they can't speak; They have eyes, but they can't see;
Isaiah 6:10
10 Make the heart of this people fat; Make their ears heavy, and shut their eyes; Lest they see with their eyes, And hear with their ears, And understand with their heart, And turn again, and be healed."
Matthew 13:14-16
14 In them the prophecy of Isaiah is fulfilled, which says, 'By hearing you will hear, And will in no way understand; Seeing you will see, And will in no way perceive:
15 For this people's heart has grown callous, Their ears are dull of hearing, They have closed their eyes; Or else perhaps they might perceive with their eyes, Hear with their ears, Understand with their heart, And should turn again; And I would heal them.'
16 "But blessed are your eyes, for they see; and your ears, for they hear.