I. Liturgy

The Sanctus is an acclamation sung after the preface of the Eucharistic prayer. It is virtually universally used in the East and West in liturgical traditions, with increasing use in the reformed orders of less liturgical Protestant traditions. The text expresses unity of earthly worship with heavenly worship in praise of God. The text is the Trisagion based on Isaiah (Isa 6:3; see also Rev 4:8), with the added Benedictus, both of whi…