In the background of this song you will find the truths of Psalms 24 and 121 primarily.
When stanza 5 speaks of the coming glorious king, take note of Psalm 72, the Gospel accounts of the Triumphal Entry on Passion/Palm Sunday (Matthew 21:1-11, Mark 11:1-11, Luke19:28-44, and John 12:12-19), and the visions of Revelation 4 and 19.
God’s creative power, on display all around us, both obligates us and motivates us to give him worship. His work of creating all, and his constant care for all of it, stirs us in thanksgiving. Belgic Confession, Articles 12 and 13 spell these truths out beautifully: “We believe that the Father, when it seemed good to him, created heaven and earth and all other creatures from nothing, by the Word—that is to say, by the Son…”
Heidelberg Catechism, Lord’s Day 9 and 10, Questions and Answers 26-28 do the same: “…the eternal Father of our Lord Jesus Christ, who out of nothing created heaven and earth…”
Our World Belongs to God, paragraph 1 identifies the exclamation that gives us joy: “Our World Belongs to God!” and then in paragraph 8 testifies that “In the beginning, God—Father, Word, Spirit—called this world into being out of nothing, and gave it shape and order.”