I am the living bread that came down from heaven. Whoever eats this bread will live forever. This bread is my flesh, which I will give for the life of the world.” Then the Jews began to argue sharply among themselves, “How can this man give us his flesh to eat?” Jesus said to them, “Very truly I tell you, unless you eat the flesh of the Son of Man and drink his blood, you have no life in you. Whoever eats my flesh and drinks my blood has eternal life, and I will raise them up at the last day. For my flesh is real food and my blood is real drink. Whoever eats my flesh and drinks my blood remains in me, and I in them. Just as the living Father sent me and I live because of the Father, so the one who feeds on me will live because of me. This is the bread that came down from heaven. Your ancestors ate manna and died, but whoever feeds on this bread will live forever.” He said this while teaching in the synagogue in Capernaum. John 6: 51-59
Jesus, as we have seen again and again, was the mind of God become a person. So this means that in Jesus we see God taking human life upon, Him facing our human situation, struggling with our human problems, battling with our human temptations, working out our human relationships…
Suddenly life and the flesh are clad with glory for they are touched with God. It was, and is, the great believe of the Greek Orthodox Christology that Jesus deified our flesh by taking it on Himself
Here is Jesus, the life of God. So long as He remains a figure in a book He is external to us; but when he enters into our hearts He is within us and we can feed upon the life and the strength and the dynamic vitality that Christ gives to us. Jesus said that we must drink His blood. He is saying: “you must take my life inside you; you must stop thinking of me as a figure in a book and a subject for theological debate; you must take me into you, and you must come into me; and then you will have life, real life.” That is what Jesus meant when he spoke about us abiding in Him and He abiding in us.
William Barclay Study Bible