We must not come to this table with pride and presumption. Rather, with humble gratitude you lay hold of Christ, the entire Christ; which means that as you then pass the bread and wine to the person beside you, if indeed they are in Christ by faith, they too are receiving all of Christ.
Part of Paul’s rebuke of the Corinthian church in 1 Corinthians 11 has to do with the architecture of their meeting place. It was common for the saints to gather in the homes of wealthier Christians. The architecture of the home was such that there would be a decent sized atrium for the people to gather, but when it came to partaking of the Lord’s Supper they would split into two separate groups.
The wealthy and important would go into the more comfortable dining area, while the lower classes––the poor, the widows, the slaves––were left out in the courtyard atrium. The rebuke of Paul about those who rushed forward to eat and leave others to go without has this architectural component in mind.