On the Blessed Sacrament.

From the Imitation of Christ. Chapter 1 :
COME to Me, all you that labor and are burdened, and I will refresh you.The bread which I will give is My Flesh, for the life of the world.Take you and eat: this is My Body, which shall be delivered for you. Do this for the commemoration of Me.He that eateth My flesh, and drinketh My blood, abideth in Me, and I in him. The words that I have spoken to you are spirit and life."
Disciple:

"Come to me," You say, "all you that labor and are burdened, and I will refresh you."

Oh, how sweet and kind to the ear of the sinner is the word by which You, my Lord God, invite the poor and needy to receive Your most holy Body! Who am I, Lord, that I should presume to approach You? Behold, the heaven of heavens cannot contain You, and yet You say: "Come, all of you, to Me."

What means this most gracious honor and this friendly invitation? How shall I dare to come, I who am conscious of no good on which to presume? How shall I lead You into my house, I who have so often offended in Your most kindly sight? Angels and archangels revere You, the holy and the just fear You, and You say: "Come to Me: all of you!" If You, Lord, had not said it, who would have believed it to be true? And if You had not commanded, who would dare approach?

Behold, Noah, a just man, worked a hundred years building the ark that he and a few others might be saved; how, then, can I prepare myself in one hour to receive with reverence the Maker of the world?

Moses, Your great servant and special friend, made an ark of incorruptible wood which he covered with purest gold wherein to place the tables of Your law; shall I, a creature of corruption, dare so easily to receive You, the Maker of law and the Giver of life?

Solomon, the wisest of the kings of Israel, spent seven years building a magnificent temple in praise of Your name, and celebrated its dedication with a feast of eight days. He offered a thousand victims in Your honor and solemnly bore the Ark of the Covenant with trumpeting and jubilation to the place prepared for it; and I, unhappy and poorest of men, how shall I lead You into my house, I who scarcely can spend a half-hour devoutly -- would that I could spend even that as I ought!"

Chapter 5:

Voice of Christ:

"HAD you the purity of an angel and the sanctity of St. John the Baptist, you would not be worthy to receive or administer this Sacrament. It is not because of any human meriting that a man consecrates and administers the Sacrament of Christ, and receives the Bread of Angels for his food. Great is the Mystery and great the dignity of priests to whom is given that which has not been granted the angels. For priests alone, rightly ordained in the Church, have power to celebrate Mass and consecrate the Body of Christ."

Chapter 8 :

The voice of Christ:

"AS I offered Myself willingly to God the Father for your sins with hands outstretched and body naked on the cross, so that nothing remained in Me that had not become a complete sacrifice to appease the divine wrath, so ought you to be willing to offer yourself to Me day by day in the Mass as a pure and holy oblation, together with all your faculties and affections, with as much inward devotion as you can.What more do I ask than that you give yourself entirely to Me? I care not for anything else you may give Me, for I seek not your gift but you. Just as it would not be enough for you to have everything if you did not have Me, so whatever you give cannot please Me if you do not give yourself."

Chapter 12: The voice of Christ.

"I AM the Lover of purity, the Giver of all holiness. I seek a pure heart and there is the place of My rest.Prepare for Me a large room furnished and I with My disciples will keep the Pasch with you.If you wish that I come to you and remain with you, purge out the old leaven and make clean the dwelling of your heart. Shut out the whole world with all the din of its vices. Sit as the sparrow lonely on the housetop, and think on your transgressions in bitterness of soul.Everyone who loves prepares the best and most beautiful home for his beloved, because the love of the one receiving his lover is recognized thereby.
You have need of Me. I do not need you. You do not come to sanctify Me but I come to sanctify you and make you better. You come to be sanctified and united with Me, to receive new grace and to be aroused anew to amend. Do not neglect this grace, but prepare your heart with all care, and bring into it your Beloved."
Chapter 11 :

Disciple:

"These also may be called the two tables, one here, one there, in the treasure house of holy Church. One is the table of the holy altar, having the holy Bread that is the precious Body of Christ. The other is the table of divine law, containing holy doctrine that teaches all the true faith and firmly leads them within the veil, the Holy of holies.

Thanks to You, Lord Jesus, Light of eternal light, for the table of Your holy teaching which You have prepared for us by Your servants, the prophets and Apostles and other learned men.

Thanks to You, Creator and Redeemer of men, Who, to declare Your love to all the world, have prepared a great supper in which You have placed before us as food not the lamb, the type of Yourself, but Your own most precious Body and Blood, making all the faithful glad in Your sacred banquet, intoxicating them with the chalice of salvation in which are all the delights of paradise; and the holy angels feast with us but with more happiness and sweetness."

Chapter 14: Disciple:

"HOW great is the abundance of Your kindness, O Lord, which You have hidden from those who fear You!When I think how some devout persons come to Your Sacrament with the greatest devotion and love, I am frequently ashamed and confused that I approach Your altar and the table of Holy Communion so coldly and indifferently; that I remain so dry and devoid of heartfelt affection; that I am not completely inflamed in Your presence, O my God, nor so strongly drawn and attracted as many devout persons who, in their great desire for Communion and intense heart love, could not restrain their tears but longed from the depths of their souls and bodies to embrace You, the Fountain of Life. These were able to appease and allay their hunger in no other way than by receiving Your Body with all joy and spiritual eagerness."