The song is a warm, simple celebration of lasting love — a promise to sing a never-ending song of love — carried by a loose, communal, gospel-tinged feel. It became the group’s biggest pop hit and was quickly covered by a great many other artists across pop, country, and gospel.

That easy melody and singalong chorus made the song a natural for bluegrass jam sessions and stage shows. It has since been recorded by numerous bluegrass and acoustic acts, holding its place as a good-natured, crowd-pleasing standard well beyond its origins.