the Eucharist is called the Mystery of faith; indeed only faith can make us see God present under the appearances of bread. 

Here, the senses do not help at all—sight, touch, and taste are deceived, finding only a little bread. 

But we have the word of the Son of God, the word of Christ, who declared: “This is my Body. . . . This is my Blood” and we firmly believe in his word. I believe everything the Son of God has said; nothing can be truer than this word of Truth.

Faith in the Eucharist is the touchstone of the true followers of Jesus, and the more intense it is, the more it reveals an intimate and profound friendship with Christ. Anyone who, like Peter, firmly believes in him, also believes and accepts all his words and all his mysteries: from the Incarnation to the Eucharist. Faith is above all a gift of God.