John the Baptist's announcement "Prepare the way for the Lord" (Matt. 3:3, a quote from Isa. 40:3) is the primary basis for this Advent hymn. Stanzas 1 and 2 apply that message to people today; stanza 3 is a confession by God's people of their need for salvation; stanza 4 is a prayer for healing and love; stanza 5 is a doxology. This much-loved Advent text is laced with various scriptural phrases.
Psalter Hymnal Handbook
What is notable about this song is that it concludes with a Trinitarian doxology, thus pointing to the truth that the coming of Christ was clearly a redeeming action involving all three members of the Trinity. Heidelberg Catechism captures the role of each member of the Trinity in Lord’s Day 12, Question and Answer 31 when it professes that Christ is called anointed, because he has been “ordained by God the Father and has been anointed with the Holy Spirit” to be our prophet, priest, and king.