"For the Scripture says 'Holy, holy, holy Lord of hosts; full is every creature of his glory'. And we, led by conscience, gathered together in one place in concord, cry to Him continuously as from one mouth, that we may become sharers in His great and glorious promises."
~ The Sanctus, here described by Pope Clement I (from his I Cor., 34:6-7) circa A.D. 95, is one of the most ancient parts of the sacred liturgy, tracing back to the time of the apostles.