The following prayer comes from the 14th century Flemish mystic John Ruusbroec, also known as John Ruysbroeck. I think it’s one of the loveliest examples of eucharistic spirituality that I have ever come across. It comes from his work called “A Mirror of Eternal Blessedness” and this translation is taken from The Spiritual Espousals and Other Works, published by Paulist Press.
you have said, “Without me you can do nothing.”
You have also said, “unless you eat my flesh and drink my blood, you have no life in you.”
You have said in addition, “Whoever eats my flesh and drinks my blood lives in me and I in him.”
Lord, I am presently a poor sinner and unworthy of the heavenly food which you yourself are. Nevertheless, Lord, you have given and left yourself for the sinner who is displeasing to himself, who contritely confesses and laments his sins, and who has a genuine trust in you. Such a person is pleasing to you, for you have taught us that you came to call not the just but the sinner, so that he might repent and do penance for his sins.
I am therefore bold and outspoken, forgetful of myself and of all my transgressions because of your grace, for you yourself have said, “Come to me, all you who labor and are burdened, and I will refresh you.” You have also said that you are our living bread which has come down from heaven and that anyone who eats it will live forever. You are also the living spring which flows out of your Father’s heart by means of the Holy Spirit.
As a consequence, Lord, the more I eat, the more hungry I become, and the more I drink, the more thirsty I become, for I cannot take you fully into myself and consume you. But I ask you, Lord, of your great nobility, that you take me fully into yourself and consume me, so that I might become one life with you and in you and that I, in your life, might be able to rise above myself and above all particular forms and exercises to a state devoid of forms — that is, to a state of formless love where you are your own beatitude and that of all the saints. It is there that I will find the fruit of all the sacraments, of all particular forms, and of all holiness.
And all God’s people said, “Amen!”