Maundy Thursday.

"Now this I ordain: not praising you, that you come together not for the better, but for the worse.For first of all I hear that when you come together in the church, there are schisms among you; and in part I believe it.For there must be also heresies: that they also, who are approved, may be made manifest among you. When you come therefore together into one place, it is not now to eat the Lord's supper.

For every one taketh before his own supper to eat. And one indeed is hungry and another is drunk.What, have you not houses to eat and to drink in? Or despise ye the church of God; and put them to shame that have not? What shall I say to you? Do I praise you? In this I praise you not. For I have received of the Lord that which also I delivered unto you, that the Lord Jesus, the same night in which he was betrayed, took bread. And giving thanks, broke, and said: Take ye, and eat: this is my body, which shall be delivered for you: this do for the commemoration of me. In like manner also the chalice, after he had supped, saying: This chalice is the new testament in my blood: this do ye, as often as you shall drink, for the commemoration of me. 

For as often as you shall eat this bread, and drink the chalice, you shall shew the death of the Lord, until he come.  Therefore whosoever shall eat this bread, or drink the chalice of the Lord unworthily, shall be guilty of the body and of the blood of the Lord.  But let a man prove himself: and so let him eat of that bread, and drink of the chalice.  For he that eateth and drinketh unworthily, eateth and drinketh judgment to himself, not discerning the body of the Lord.  Therefore are there many infirm and weak among you, and many sleep.

But if we would judge ourselves, we should not be judged.  But whilst we are judged, we are chastised by the Lord, that we be not condemned with this world.  Wherefore, my brethren, when you come together to eat, wait for one another.  If any man be hungry, let him eat at home; that you come not together unto judgment. And the rest I will set in order, when I come."

I Cor. 11:17

" In this Sacrament Thou hast bestowed many good things, and still bestowest them continually on thine elect who communicate devoutly, O my God, Lifter up of my soul, Repairer of human infirmity, and Giver of all inward consolation. For Thou pourest into them much consolation against all sorts of tribulation, and out of the deep of their own misery thou liftest them up to the hope of Thy protection, and with ever new grace, dost inwardly refresh and enlighten them ; so that they who felt themselves to be anxious and without affection before Communion, afterwards being refreshed with heavenly food and drink, find themselves changed for the better. And even in such wise thou dealest severally with thine elect, that they may truly acknowledge and clearly make proof that they have nothing whatsoever of their own, and what goodness and grace come

 Wherefore if it is not suffered to me to draw from the fulness of the fountain, nor to drink unto satisfying, yet will I set my lips to the mouth of the heavenly conduit, that at least I may receive a small drop to quench my thirst, that I dry not up within my heart. And if I am not yet able to be altogether heavenly and so enkindled as the Cherubim and Seraphim, yet will I endeavour to give myself unto devotion, and to prepare my heart, that I may gain if it be but a little flame of the divine fire, through the humble receiving of the lifegiving Sacrament. But whatsoever is wanting unto me, O merciful Jesus, Most Holy Saviour, do Thou of Thy kindness and grace supply, who hast vouchsafed to call all unto Thee, saying, Come unto me, all ye that are weary and are heavy laden, and I will refresh you."

-The Imitation of Christ, Book Four.