A church can’t have diversity on the Gospel, on the view of scripture, or on the core doctrines of the faith. But because a “transformed mind” takes time (in fact, an entire lifetime) to develop after we are saved, people will inevitably be marked by diversity in their convictions on issues beyond the core issues above and therefore a church will as well. Romans 14 and 15 helps us to understand how to live in harmony despite such diversity. Vs. 15-23 reminds us to be considerate (walk in love) with bro/sis who differ from you on a diversity issue. Keep reminding yourself that the Kingdom is ultimately about righteousness, peace, joy, not in conformity to all issue. So make the bro/sis more important than the diversity issue.