When it comes to peripheral doctrines, I think we need to be extremely wary of a narrow dogmatism. It is quite possible that we may be wrong and the brother that we’ve labeled “heretic” may be right, at least as much as a stopped clock is right twice a day. And this should give us pause and cause us to reflect on that possibility. After all, if we are secure in our understanding what harm could come from listening sincerely?
One of the things that should stay our attitude is the almost certain reality that when we come into our Lord’s presence and are more enlightened as to the deep things of God, how humbled we will be by how much we got wrong and how much more we have to learn.