“…with all humility and gentleness, with patience, showing forbearance to one another in love, being diligent to preserve the unity of the Spirit in the bond of peace.” (Ephesians 4:2-3)
“And beyond all these things put on love, which is the perfect bond of unity.” (Colossians 3:14)
The joke about both art and porn is that “I can’t tell you what it is, but I know it when I see it.”
That may be how it is with church unity. There is nothing else like it. When a church is unified and moves forward as a healthy body for Christ, the rest of the Christian world stands back in awe. Something inside us calls out “Now, that is what I’m talking about!”
To paraphrase Tolstoy on families, all unified churches are alike but divided churches are each divided in their own way.