1 Cor 11:23-26
"For I received from the Lord what I also delivered to you, that the Lord Jesus on the night when he was betrayed took bread, and when he had given thanks, he broke it, and said, ‘This is my body, which is for you. Do this in remembrance of me.’"
The earliest Eucharistic tradition in the NT (prior to the Gospels). Three dimensions: (1) anamnesis — memorial of Christ’s death; (2) proclamation (katangellein) — the Supper as an act of preaching; (3) anticipation — ‘until he comes.’ The Supper looks back (cross), up (risen Christ present), and forward (second coming).
1 Cor 11:27-29
"Whoever, therefore, eats the bread or drinks the cup of the Lord in an unworthy manner will be guilty concerning the body and blood of the Lord. Let a person examine himself, then, and so eat of the bread and drink of the cup."
Eating ‘unworthily’ (anaxios) does not refer to the personal unworthiness of the believer (we are all unworthy), but to the disorderly manner in which the Corinthians celebrated. Self-examination (dokimazeto) is necessary before participation.