God Is Glorified When We Worship Him (vv. 46-50). After looking back at God’s gracious ministry to him, what else could David do but praise Him? “He must increase, but I must decrease” (John 3:30). David didn’t take things into his own hands but allowed the Lord to vindicate him when the time was right (1 Sam. 24:1-7; 26:1-12; Rom. 12:17-21).

Paul quoted verse 49 in Romans 15:9 and applied it to the Jews praising God among the Gentiles. In Romans 15:10-11, the Jews and Gentiles rejoice together–the result of Paul’s ministry to the Gentiles–and then Romans 15:12 announces Jesus Christ reigning over both Jews and Gentiles (see Isa. 11:10).

The psalm climaxes with David exalting the Lord for His covenant to him and to his descendants (v. 50; 2 Sam. 7). Little children often use their own names when they ask for something (“Please give Tommy a cookie”), and David used his own name here, just like a little child. (See also 2 Sam. 7:20.) David used the word forever, so he must have realized that it would be through the promised Messiah that the kingdom promises would be fulfilled. “And He shall reign forever and ever” (Rev. 11:15 nkjv).