Rattigan, what did Clint Eastwood as "Dirty Harry" ask the criminal: Do you feel lucky? It's a gamble, I know, but do you want to chance it? The language and symbolism point to the memorial. The book of John does not feature the memorial celebration at all except for John 6. The difference here is that he spoke to everyone, including Pharisees. Interestingly, the chapter ends by referencing Judas, about to betray him (John 6:71). The contrary position is explained by NET footnote:
John 6:53 (NET footnote) says: Unless you eat the flesh of the Son of Man and drink his blood. These words are at the heart of the discourse on the Bread of Life, and have created great misunderstanding among interpreters. Anyone who is inclined toward a sacramental viewpoint will almost certainly want to take these words as a reference to the sacrament of the Lord’s Supper, or the Eucharist, because of the reference to ‘eating his flesh’ and ‘drinking his blood’ (John 6:53ff.; cf. Matt. 26:26-28). But this does not automatically follow: By anyone’s definition there must be a symbolic element to the eating which Jesus speaks of in the discourse, and once this is admitted, it is better to understand it here, as in the previous references in the passage, to a personal receiving of (or appropriation of) Christ and his work. Notice that in John 6:54 (NET footnote) the result (has eternal life and I will raise him up at the last day) is produced by eating (Jesus’) flesh and drinking his blood. Compare John 6:40 where the same result is produced by “looking on the Son and believing in him.” This suggests that the phrase here (eats my flesh and drinks my blood) is to be understood by the phrase in John 6:40 (looks on the Son and believes in him).
However, I am not convinced. It is no
coincidence that Jesus uses this very same terminology when instituting the
memorial of his death. Early on in his ministry (already in John 6) he would be
preparing the people for the Eucharist. His intimate followers, later to be
anointed with holy spirit, are in a special covenant relationship with him
(Matt. 19:28; Luke 22:28-30; cf. Rev. 5:9, 10). They would be celebrating the
memorial in remembrance of their Lord, for forgiveness of sins as well as being
participants of the new covenant as leaders of the Israel of God (Matt. 26:28;
1 Cor. 11:25; Gal. 6:15, 16; Rev. 14:1-5; 20:4). Jesus’ earthly subjects would
celebrate the memorial in remembrance of their Lord, for forgiveness sins and
being participants of the new covenant as part of the Israel of God. By so
doing both groups would be unified in “proclaiming the death of the Lord until
he arrives” and attaining the forgiveness of sins (Matt. 26:28; 1 Cor.
11:24-26; Gal. 6:15, 16; cf. John 6:56).