Acts 15...unity is when absolute commonalities transcend relative dissimilarities.
Great leaders are always asking the question, "What are the absolutes, immutable truths, timeless principles, upon which we agree, hold in common? And, what are the issues where we disagree, dissimilarities, that are relative to ones perspective, opinion, preferences?"
When we elevate issues that are relative to an undeserved place of absolutism, we create a legalism. When we concede absolutes to an undeserved place of relativism, we create permissiveness.
Discern, dialogue, distinguish...lead.