“I suggest that within the Farewell Discourse this ‘oneness’ is expressed in a Eucharistic love feast even where diversity continues. When believers gather together around the table with self-giving love, they experience in a concrete and sacramental way the common bond that unites them; that is, the perichoretic love of the Triune God. Unity, then, is not best expressed in forms, institutions, and extended theological declarations as much as it is in the reality of the Eucharist in a loving community where we are nourished by the life of divine perichoresis.”
One paragraph, near the end, from a recent paper I uploaded. I presented this paper at the Lipscomb Preaching Seminar in February 2014. The seminar was part of an academic course, and that is the reason why it assumes much and not everything is explained.
The full paper is linked Handout for Lecture.