St. John Vianney
“He changes bread into His Body, and wine into His Blood, as formerly at the Last Supper. He, Life Eternal, and always working puts Himself in a state of death and places Himself on the tongues and in the hands of men. True God and true man, He is contained whole and entire under the least particle of the species of bread and wine. He is eaten by those who receive Him without being consumed. He may be found at the same time in an infinite number of places.”
Source: St. John Vianney, The Meditations of the Curé D’Ars