Isaiah 6:10

Make the heart of this people fat, insensitive to impressions for good, so that feeling, reason, and will would become callous, and make their ears heavy, the hearing of the mind becoming impaired beyond the possibility of understanding, and shut their eyes, namely, those of the spirit, lest they see with their eyes, and hear with their ears, and understand with their heart, and convert, that is, be converted, and be healed. Note that the members or organs spoken of are given in inverted order in the second part of the sentence, to increase its impressiveness. It is the judicial hardening, the judgment of obduration, which is here described, for if people deliberately and maliciously reject God's offers of salvation, He may punish them in the manner here described, so that the message which otherwise works salvation becomes to them a savor of death unto death. Cf 2 Corinthians 2:16; Matthew 13:14; Mark 4:12; Luke 8:10; John 12:40; Acts 28:26. It is not that God works obduration, but He surrenders the godless to their evil will; He withdraws from their hearts with His Holy Spirit.