On this day the Church remembers Our Lord’s institution of the Sacrament of His Body and Blood. The Liturgy is that of St. Basil’s, which is used on all the Sundays of Lent as well. It is one of the most complete statements of the faith, despite its brevity (compared to Catechism or a book). Printed here is a portion of the Anaphora of St. Basil’s Liturgy, in the translation of Archbishop Dmitri (Royster) of the South (OCA). 

With these blessed Powers, O Master, Lover of man, we sinners also do cry out and say, Holy art thou, in truth, and all-holy, and there is no measure to the magnificence of thy holiness, and holy art thou in all thy works, for in righteousness and true judgment hast thou brought about all things for us. When thou hadst fashioned man, taking dust from the earth, and hadst honored him with thine own image, O God, thou ‘didst set him in a paradise of plenty, promising him life immortal and the enjoyment of eternal good things in the observance of thy commandments. But when he disobeyed thee, the true God, who had created him, and was led astray by the deceit of the serpent, and was slain by his own trespasses, thou didst banish him, in thy righteous judgment, O God, from Paradise into this world, and didst turn him back to the earth from which he was taken, dispensing salvation for him through regeneration, which is in thy Christ Himself. Yet thou didst not turn thyself away till the end from thy creature which thou hadst made, O Good One, neither didst thou forget the work of thy hands, but thou didst look upon him in divers manners, through thy tenderhearted mercy. Thou didst send forth prophets; thou hast wrought mighty works through the saints who in every generation have been well-pleasing unto thee; thou didst speak to us by the mouths of thy servants the prophets, who foretold to us the salvation which was to come; thou didst give the Law as an help; thou didst appoint guardian angels. And when the fulness of time was come, thou didst speak unto us through thy Son Himself, by whom also thou madest the ages; Who, being the brightness of thy glory, and the express image of thy person, and upholding all things by the word of His power, deemed it not robbery to be equal to thee, the God and Father. But albeit He was God before the ages, yet He appeared upon earth and sojourned among men; and was incarnate of a holy Virgin, and did ‘ empty Himself, taking on the form of a servant, and becoming conformed to the body of our humility, that He might make us conformed to the image of His glory. For as by man sin entered the world, and by sin death, so thine Only-begotten Son, Who is in thy bosom, God and Father, was well-pleased to be born of a woman, the holy Theotokos and Ever-virgin Mary, to be born under the Law, that He might condemn sin in His flesh, that they who were dead in Adam might be made alive in thy Christ Himself, and, becoming a citizen in this world, and giving ordinances of salvation, He removed from us the delusion of idols and brought us unto a knowledge of thee, the true God and Father, having won us unto Himself for His own people, a royal priesthood, a holy nation, and being purified with water, and sanctified by the Holy Spirit, He gave Himself a ransom to Death, whereby we were held, sold under sin. And having descended into hell through the Cross, that He might fill all things with Himself, He loosed the pains of death, and rose again from the dead on the third day, making a way for all flesh unto the resurrection from the dead – for it was not possible that the Author of life should be holden of corruption – that He might be the first-fruits of those who have fallen asleep, the first-born from the dead, that He might be all, being first in all. And, ascending into heaven, He sat down at the right hand of thy majesty on high, and He shall return to render unto everyone according to his works. And He hath left with us as remembrances of His saving Passion these Things which we have set forth according to His commandment. For when He was about to go forth to His voluntary, and celebrated, and life-creating death, in the night in which He gave Himself up for the life of the world, He took bread in His holy and immaculate hands, and when He had shown it unto thee, the God and Father, and given thanks, and blessed it, and hallowed it, and broken it

And exclaiming, he says this:    He gave it to His holy disciples and apostles, saying, Take, eat, this is my Body, which is broken for you for the forgiveness of sins.     The choir sings: Amen.    

While this is being said, the deacon shows the priest the holy diskos, holding his orarion with three fingers of his right hand, and in like manner when the priest says: Drink ye all of this. . . he shows him the holy chalice. The priest, secretly:    Likewise, having also taken the cup of the fruit of the vine, and mingled it, and given thanks, and blessed and hallowed it, And again he exclaims this:    He gave it to His holy disciples and apostles, saying, Drink ye all of this; this is my Blood of the New Testament, which is shed for you and for many, for the forgiveness of sins.

The choir sings: Amen. The priest, bowing his head, prays:    Do this in remembrance of me, for as often as ye shall eat this Bread and drink of this Cup, ye do proclaim my death and confess my resurrection.

Wherefore, 0 Master, we also remembering His saving Passion and life-creating Cross, His three-day burial, and resurrection from the dead, His ascension into heaven, and sitting down at thy right hand, God and Father, and His glorious and fearful second coming,

The priest exclaims:    Thine own of thine own we offer unto thee on behalf of all and for all.