When the Bible emphasizes harmony there is an implicit suggestion that disharmony would be the norm otherwise. It’s an unfunny joke how often Christians get cross-threaded. Maybe Mormon churches, and Kingdom Hall’s, and Buddhist Temples, and cults in Texas struggle with unity too, but for some reason I don’t think it’s the same. There is something prodigious in our ability as Evangelicals to draw lines where the Bible doesn’t. Once the lines are drawn our aversion to grayness kicks in and we’re compelled to take a side. The next thing you know you’ve just started a denomination. To me the following formula seems to be the best way to cultivate mutual respect and harmony. The conscience governs preferences (Romans 14:23), the Scriptures govern doctrine, and the Holy Spirit governs attitude (Philippians 2:5, 4:2-3). This is the formula for harmony. If this governs behavior and is working properly the result is a stable Christian. Stable Christians bring harmony to the body. That kind of body is a place where unstable Christians have the examples they need to follow. Those unstable Christians gradually become the next generation of Godly examples. A virtuous cycle of maturity is the result.