The Holy Supper is no common meal nor is it the banquet of an earthly king. But, here we have, placed before us, the holy mystery of the body and blood of Christ, in which we are to participate. Certainly, then, a worthy preparation is needful, that we may not, unworthily eating of it, find death instead of life and receive judgment instead of mercy.
How the holy patriarch trembles, how he fears, although so remarkable for the strength of his faith, when the Son of God, in human form, appears to him and announces the impending destruction of Sodom (Genesis 18.2). But, here, the Lamb of God is set forth before us, and that not curiously to be gazed upon, but to be tasted and eaten. When Uzziah rashly and inconsiderately drew near to the Ark of the Covenant, the Lord immediately smote him with leprosy (2 Chronicles 26.16). What wonder that he who eateth of this bread and drinketh of this wine unworthily should eat and drink to his condemnation? For, here, is the true ark of the covenant, of which the old was only a type.
From: Sacred Meditations by Johann Gerhard; translated from the Latin by C. W. Heisler; reprint (Malone, TX: Repristination Press, 1998), pp. 108-109 (from Meditation 20). Reprinted from – Philadelphia: Lutheran Publication Society (1896). Originally published in 1606.
Johann Gerhard (1582-1637) was a German Lutheran theologian, pastor, and author.