The Holy Trinity
Having entered with Christ into the heavenly places in the Little Entrance, having asked mercy of the Saints remembered on that day, we conclude, as we stand with them before God, with the Trisagion prayer, “Holy God, Holy Mighty, Holy Immortal, have mercy on us.” We bow down in worship before the creator of all that is and submit ourselves to the One revealed to us in Jesus Christ as Father, Son, and Holy Spirit.
This participation with the Saints in the worship of the Holy Trinity is made more dramatic on those feasts (Pascha, all the days of Bright Week, Pentecost, Nativity, Theophany, Lazarus Saturday, and Holy Saturday) and at every baptism, when we sing, instead of “Holy God,”1 “As many as have been baptized into Christ, have put on Christ.” We are called back each time to God's gracious gift of new life in him through Jesus Christ in the power of the Holy Spirit.
Also called The Trisagion. ↩