|At Prayer in the Garden of Olives|
Have Mercy, O Lord by Fr. Lucien Deiss, C.S.Sp. (1921-2007) was first published in 1965 as part of the his collection: Biblical Hymns and Psalmns, Vol. 1. While he is best known for his musical works and his involvement with Vatican II liturgical reforms, this Spiritan Father was also a missionary: giving retreats and serving the poor in several nations of the world. In the Liturgy of the Hours, Have Mercy, O Lord is used during Holy Week.