When I was a child, my church always sang “Let All Mortal Flesh Keep Silence” on Christmas Day as the Communion elements were processed into the sanctuary. The congregation would start quietly and crescendo with each verse, serving to highlight the Lord’s Supper as the high point of the service. We would have the hymns printed in a bulletin, so I remember being surprised the first time I realized that this hymn is found in the Lord’s Supper section of the hymnal rather than the Christmas section.