89:19-20 The psalmist now reminded God that He had chosen David to be His anointed servant king. God's "godly ones"(v. 19) were the godly in Israel.
89:21-25 God had promised to bless David with success and power. He had said he would defeat his enemies and extend his influence greatly. Furthermore He had pledged to be faithful and loyal to David.
89:26-29 God promised that David would enjoy a special relationship of intimacy with Yahweh who would treat him as His first-born son (2 Sam. 7:14). This involved double blessings and much authority under his Father. David would become the most highly exalted king on the earth. Moreover God would bless him with a dynasty that would rule Israel forever (cf. 2 Sam. 7:12-13, 17).
89:30-37 Sin and disobedience would not cancel God's promises to David in the covenant. They would bring discipline on the offenders, but God swore to deliver the blessings He had promised David.
Since Jesus Christ, David's descendent, has not yet ruled over Israel as these promises guarantee, we should look for a literal fulfillment of them in the future. This means He will rule on the earth since this is what God promised David (2 Sam. 7:5-16). For this reason we look for an earthly reign of Messiah, not just a heavenly reign over the hearts of all believers. The hope of an earthly reign over Israel is what distinguishes premillennialists from amillennialists. This hope rests on a literal interpretation of God's promises in the Davidic Covenant (cf. vv. 3-4, 27-29, 35-37, and 49).158
