30:18-24 We have here further intimations of the favour of God for them after the days of their calamity have expired. The proper work and office of Christ, as Mediator, is to draw near unto God, for us, as the High Priest of our profession. His own undertaking, in compliance with his Father's will, and in compassion to fallen man, engaged him. Jesus Christ was, in all this, truly wonderful. They shall be taken again into covenant with the Lord, according to the covenant made with their fathers. I will be your God: it is his good-will to us, which is the summary of that part of the covenant. The wrath of God against the wicked is very terrible, like a whirlwind. The purposes of his wrath, as well as the purposes of his love, will all be fulfilled. God will comfort all that turn to him; but those who approach him must have their hearts engaged to do it with reverence, devotion, and faith. How will they escape who neglect so great salvation?

21. their nobles—rather, "their Glorious One," or "Leader" (compare Ac 3:15; Heb 2:10), answering to "their Governor" in the parallel clause.

of themselves—of their own nation, a Jew, not a foreigner; applicable to Zerubbabel, or J. Hyrcanus (hereditary high priest and governor), only as types of Christ (Ge 49:10; Mic 5:2; Ro 9:5), the antitypical "David" (Jer 30:9).

cause him to draw near—as the great Priest (Ex 19:22; Le 21:17), through whom believers also have access to God (Heb 10:19-22). His priestly and kingly characters are similarly combined (Ps 110:4; Zec 6:13).

who … engaged … heart to approach—literally, "pledged his heart," that is, his life; a thing unique; Messiah alone has made His life responsible as the surety (Heb 7:22; 9:11-15), in order to gain access not only for Himself, but for us to God. Heart is here used for life, to express the courage which it needed to undertake such a tremendous suretyship. The question implies admiration at one being found competent by His twofold nature, as God and man, for the task. Compare the interrogation (Isa 63:1-3).