"Let me assure you that no authorities of my church, or of any otherchurch for that matter, will ever exert influence on presidentialdecisions. Their authority is theirs, within the province of churchaffairs, and it ends where the affairs of the nation begin."
In this zinger - he sums up all he needed to say. It's the basic jist of "you have nothing to worry about" but with some meat on the bones of it. By far the strongest, most direct, simple to understand note of unification he could pronounce in the speech!