2 Samuel 7:14

I will be his Father, and he shall be my son. Between father and son there is not only love, but oneness. Whatsoever the father hath, that belongs also to the son by natural right. But this sonship is magnified in the Psalms beyond the measure of Solomon or any natural limits. The Son there is "the Firstborn," which Solomon was not, "higher than the kings of the earth" ( Psalms 89:27 ); and he must have "the nations for his inheritance, and the uttermost parts of the earth for his possession" ( Psalms 2:8 ). Psalms like the second and seventy-second belong, not to Solomon personally, but to him as the type of the prince of Peace; and they help to show us what is the true meaning and fulfilment of the words here. The rod of men; that is, such punishment as men fitly receive for their faults. David's natural posterity was to be exempt neither from human depravity, nor from punishment, nor from the changes and chances of mortal life. With them, as with men generally, there would be a tangled skein, of virtue and sin, of folly and wisdom, of terrible fall and penitent recovery. But there was to be no blotting out of David's lineage. Great earthly houses, in the long course of events, one after another become extinct, and even the tabernacle of David was to fall ( Amos 9:11 ), but not forever. God would "raise up its ruins' in Christ, and "build it as in the days of old." So in Isaiah 9:1 there is the same thought of the complete down-hewing of David's earthly lineage, yet only to rise again to nobler life and vigour, in the Branch, or Sucker, that was to spring from the fallen trunk.