These words of Isaiah are repeated five times in the New Testament as the description of the Jewish people in its latest stage of decay. Mat 13:13; Mar 4:12; Luk 8:10; Joh 12:40; Act 28:26.
Hardened (πεπώρωκεν)
See on the kindred noun πώρωσις, hardness, Mar 3:5.
Understand (νόησωσιν)
Rev., better, perceive. Mark has συνιῶσιν, understand. See on understanding, Luk 2:47.
Be converted (ἐπιστραφῶσιν)
See on Mat 13:15; see on Luk 22:32. Rev., more accurately, turn, with the idea of turning to or toward something (ἐπί).