Translation of the verse 46 from Surah Al-hajj : Number of verses 78 - - page 337 - Part 17.
Have they not travelled through the land, and have they hearts wherewith to understand and ears wherewith to hear? Verily, it is not the eyes that grow blind, but it is the hearts which are in the breasts that grow blind.
So have they not traveled through the earth and have hearts by which to reason and ears by which to hear? For indeed, it is not eyes that are blinded, but blinded are the hearts which are within the breasts.
(22:46) Have they not gone about in the land so as to make their hearts think and ears hear? The fact, however, is that it is the hearts in the breasts and not the eyes that become blind. *91
*91) The words ".... the hearts .... blind" have been used in the metaphorical and not in the literal sense. Since the heart is regarded as the centre of emotions, feelings and of mental and moral qualities, these words have been used to imply that their obduracy has inhibited them from feeling and acting rationally.