Patricius,

Roman Catholics are fond of quoting John 6 with regards to communion, but few quote verse 63: "It is the spirit that giveth life; the flesh profiteth nothing: the words that I have spoken unto you are spirit, and are life." With regard to your citation, It should be noted first that Jesus is not speaking of the Lord's Supper here, which had not even been established at that time (nor does John's Gospel include an account of the institution of this sacrament, for that matter). But the idea that Jesus is propounding is not one of sanctified cannibalism, literally eating His physical body. The idea is rather that Christ is the source of spiritual nourishment, & in particular that His self-sacrifice is the source of eternal life for men. Jesus speaks in a similar manner to the woman at the well, using the figure of water (John 4:10-14).

Kyle

I tell you, this man went down to his house justified.