Isaiah 42:4 - Coke's Commentary on the Holy Bible

He shall not fail, nor be discouraged— These words are to be referred to the success of this great teacher's doctrine; who, with admirable diligence and patience, without any remission of zeal or labour, should go on calmly and deliberately in its establishment, nor depart from the undertaking, till he had settled his doctrine and left a perfect canon of it to his disciples: a doctrine, not confined to the Jews, but to pass to the Gentiles—the isles of the earth, and to be by them received with faith and hope. Compare chap. Isaiah 51:5 and see Vitringa.