For the Corinthians—and us as well—, the Apostle lays a solid foundation that connects the Eucharist with unity among the brethren and the sacredness of the human body; his terminology bridges all three. For recent converts who knew nothing other than pagan Corinthian culture, this would have been a steep climb for sure.

St Paul speaks of three substantiations of the Corporate Christ we must pay attention to. All three are connected as a unity of Christ. This—I believe—is the issue God is putting His finger on during this epoch. Let us look at all three.
https://orthodoxreflections.com/rightly-discerning-the-body-corporate-christ/