For God is the King of all the earth: sing you praises with understanding.
Read Chapter 47
Augustine of Hippo
8. "For God is the King of all the earth" (ver. 7). What? And before was He not God of all the earth? Is He not God of both heaven and earth, since by Him surely were all things made? Who can say that He is not his God? But not all men acknowledged Him their God; and where He was acknowledged, there only, so to say, He was God. "In Judah is God known." Not yet was it said to the sons of Korah, "O clap your hands, all ye nations." For that God known in Judah, is King of all the earth: now by all He is acknowledged, for that is fulfilled which Isaiah saith, "He is thy God who hath delivered thee, the God of the whole earth shall He be called." "Sing ye praises with understanding." He teacheth us and warneth us to sing praises with understanding, not to seek the sound of the ear, but the light of the heart. The Gentiles, whence ye were called that ye might be Christians, adored gods made with hands, and sang praises to them, but not with understanding. If they had sung with understanding,...
Wisely. Hebrew mascil, which is so often rendered "understanding "in the titles. No one can do well, what he does not understand. (Calmet)
The union of faith and good works, is singing wisely. (St. Chrysostom) (Calmet)
Concordent manuslingua. (St. Augustine) (Du Hamel)
Let each strive to know the mysteries of faith. (Worthington) ...