It’s really cool, the whole thing about communion really is that it’s fellowship-oriented…joining…
In the culture at Jesus’ time, people mostly just ate with friends, and their friends were often peers. But Jesus’ friends were not peers. And the fact that He ate with sinners and such outcasts expresses Jesus making friends with them at meal-fellowship, also points to the eschatological age (the end days), when the outcasts will be (are now) invited to eat with the Lord, as friends. It’s really deep when you think about it.
Also, in old days (Old Testament times) when a nation wanted to wipe out somebody completely, they’d make it so that their name wasn’t remembered. But at communion, Jesus is to be remembered. Also, taking communion is not only partaking with other believers, but also with Christ. The Last supper was the last time He would eat food before the establishment of His Kingdom (which took place at His resurrection). So it’s suggested that when we partake in communion in remembrance of Him, we’re actually eating WITH HIM at the table…as His friends…everybody, together in the Kingdom.
Also, back to the first part…so even if we have enemies, we make them friends with us when we have fellowship with them at the table, because its sharing the table with them, and also because it’s sharing at the table with them in the presence of the Lord, as HE eats with us, too.
The Apostles’ only thing in common was Jesus (well, Peter and Andrew had the same parents), but really, when you look at the motley crew of the apostles (band of outcasts who’d never get along), or what a motley crew the apostles were…I mean, you had fishermen, a tax collector, a Zealot (believed in forceful conversions), 2 guys with really bad tempers, and a thief. If not for Jesus, you’d never see them together. The only thing they had in common was Jesus. And after Jesus’ resurrection and ascension, it was Jesus that held them together as friends. So in the same way, taking communion together brings us together at the table as friends, as we join the Lord at meal fellowship.
Also again, the thing about calling it “Eucharist”:
“Charis” in the Greek means “Grace”. So the Greeks couldn’t say the word “Eu-Charis-t”, without saying “grace”: we are joined together as 1 body by God’s grace. Maybe that’s why they call the prayer before meals, “saying grace”.