7:12 And when, and c. - When the time of thy life shall expire. This phrase implies, that his days shall be prolonged to the usual course of nature, and not cut off in the midst, by any violent or untimely death. I will set - I will set up in thy throne, thy posterity, first Solomon, and then others successively, and at last the Messiah. So the following words may be understood, part of his posterity in general, part of Solomon, and part of Christ only, according to the different nature of the several passages.
7:4-17 Blessings are promised to the family and posterity of David. These promises relate to Solomon, David's immediate successor, and the royal line of Judah. But they also relate to Christ, who is often called David and the Son of David. To him God gave all power in heaven and earth, with authority to execute judgment. He was to build the gospel temple, a house for God's name; the spiritual temple of true believers, to be a habitation of God through the Spirit. The establishing of his house, his throne, and his kingdom for ever, can be applied to no other than to Christ and his kingdom: David's house and kingdom long since came to an end. The committing iniquity cannot be applied to the Messiah himself, but to his spiritual seed; true believers have infirmities, for which they must expect to be corrected, though they are not cast off.
