In this text the imagery of a liturgical procession becomes a marching metaphor for the journey of life. The call to "rejoice, give thanks and sing" (st. 1) is extended to all people, "bright youth and snow-crowned age, both men and women" (st. 2), and on all occasions, "by night and day, in gladness and in woe" (st. 3). Life's pilgrimage has a specific goal, to be at rest in the new Jerusalem (st. 4) where all God's creatures will join in a great doxology (st. 5). The "rejoice" theme in the refrain is borrowed from Philippians 4:4.
Psalter Hymnal Handbook