As the living Father hath sent me, and I live by the Father: so he that eateth me, even he shall live by me.
Note 10 at Joh 6:57: Once again, these Jews had their minds limited to the physical realm (Ro 8:5-7 and 1Co 2:14). They thought that Jesus was speaking of cannibalism. However, as can be clearly seen by Jesus' later explanation at the institution of the Lord's Supper (Mt 26:26-28, Mr 14:22-24, and Lu 22:19-20), Jesus was speaking of the spiritual man. Just as our physical man receives life from the food we eat, so the spiritual man receives life as we partake of Jesus, the life of man (Joh 1:4, 10:10, and 14:6) or the "bread of life" (Joh 6:48). Jesus stated plainly in Joh 6:63 that the words He was speaking were spiritual, not physical.