2. The prophet goes on (v. 20) to describe the blindness and obstinacy of the Jewish nation, just as our Saviour describes it in his time (Matt. xiii. 14, 15): Seeing many things, but thou observest not. Multitudes are ruined for want of observing that which they cannot but see; they perish, not through ignorance, but mere carelessness. The Jews in our Saviour's time saw many proofs of his divine mission, but they did not observe them; they seemed to open their ears to him, but they did not hear, that is, they did not heed, did not understand, or believe, or obey, and then it was all one as if they had not heard.