Gospel: John 6: 35-40
Jesus comes to do the will of God. He will set an example of how to do God's will so that others might follow this example. The Jewish tradition had a wealth of laws and rules attempting to legislate how God's will was to be carried out in the world, but few if any examples of how it actually looks in the world. Rather than provide a law, Jesus sets about to offer an example, consisting of being the mercy and loving kindness of God in the world.
To believe in Jesus, then, is not a matter of intellectual assent to certain propositions about Jesus, nor is it the mere recitation of a creed written long after Jesus' time on earth. To believe in Jesus is, rather, about an entire way of living as Jesus did. It is about doing God's will as Jesus demonstrated, in being the mercy and love of God in the world. It is the submission of one's entire being and person to a way of living in the world.
Bread is necessary for life in a physical sense. Jesus is our bread of life in a spiritual sense, in being the ongoing example and inspiration for us to live in the world, in doing the will of God, in being bread for others ourselves. To partake of this bread is to commit oneself to being like the Lord in our way of life. To accept and receive communion is our act of faith, our credal statement expressed not in words but in deed, to express hope that all our deeds follow the way of Jesus.