By the loving-kindness of God ye have heard sufficiently at our former meetings concerning Baptism, and Chrism, and partaking of the Body and Blood of Christ; and now it is necessary to pass on to what is next in order, meaning to-day to set the crown on the spiritual building of your edification. . . .
After this the Priest cries aloud, “Lift up your hearts.” For truly ought we in that most awe-inspiring hour to have our heart on high with God, and not below, thinking of earth and earthly things. In effect therefore the Priest bids all in that hour to dismiss all cares of this life, or household anxieties, and to have their heart in heaven with the merciful God. Then ye answer, “We lift them up unto the Lord:” assenting to it, by your avowal. . . .
Then the Priest says, “Let us give thanks unto the Lord.” . . . Then ye say, “It is meet and right” . . . After this, we make mention of heaven, and earth, and sea; of sun and moon; of stars and all the creation, rational and irrational, visible and invisible; of Angels, Archangels, Virtues, Dominions, Principalities, Powers, Thrones; of the Cherubim with many faces . . .
We make mention also of the Seraphim, whom Esaias in the Holy Spirit saw standing around the throne of God, and with two of their wings veiling their face, and with twain their feet, while with twain they did fly, crying Holy, Holy, Holy, is the Lord of Sabaoth. . . .
Then having sanctified ourselves by these spiritual Hymns, we beseech the merciful God to send forth His Holy Spirit upon the gifts lying before Him; that He may make the Bread the Body of Christ, and the Wine the Blood of Christ; for whatsoever the Holy Ghost has touched, is surely sanctified and changed.
Then, after the spiritual sacrifice, the bloodless service, is completed, over that sacrifice of propitiation we entreat God for the common peace of the Churches, for the welfare of the world; for kings; for soldiers and allies; for the sick; for the afflicted; and, in a word, for all who stand in need of succour we all pray and offer this sacrifice.
Then we commemorate also those who have fallen asleep before us, first Patriarchs, Prophets, Apostles, Martyrs, that at their prayers and intercessions God would receive our petition.
Then on behalf also of the Holy Fathers and Bishops who have fallen asleep before us, and in a word of all who in past years have fallen asleep among us, believing that it will be a very great benefit to the souls, for whom the supplication is put up, while that holy and most awe-inspiring sacrifice is set forth. . . .
Then, after these things, we say that Prayer which the Saviour delivered to His own disciples, with a pure conscience entitling God our Father, and saying, Our Father, which art in heaven . . .
After this the Priest says, “Holy things to holy people.” Holy are the gifts presented, having received the visitation of the Holy Ghost; holy are ye also, having been deemed worthy of the Holy Ghost; the holy things therefore correspond to the holy persons. Then ye say, “One is Holy, One is the Lord, Jesus Christ.” For One is truly holy, by nature holy; we too are holy, but not by nature, only by participation, and discipline, and prayer. . . .
After this ye hear the chanter inviting you with a sacred melody to the communion of the Holy Mysteries, and saying, O taste and see that the Lord is good. Trust not the judgment to thy bodily palate no, but to faith unfaltering; for they who taste are bidden to taste, not bread and wine, but the anti-typical Body and Blood of Christ . . .
Then after thou hast partaken of the Body of Christ, draw near also to the Cup of His Blood; not stretching forth thine hands, but bending, and saying with an air of worship and reverence, Amen, hallow thyself by partaking also of the Blood of Christ.
Hold fast these traditions undefiled and, keep yourselves free from offence. Sever not yourselves from the Communion; deprive not yourselves, through the pollution of sins, of these Holy and Spiritual Mysteries. And the God of peace sanctify you wholly; and may your spirit, and soul, and body be preserved entire without blame at the coming of our Lord Jesus Christ:—To whom be glory and honour and might, with the Father and the Holy Spirit, now and ever, and world without end. Amen.
– Excerpts from St Cyril of Jerusalem, Lecture XXIII (On the Sacred Liturgy).