"If I think I am better than my neighbor, or more moral, and therefore, by extension, somehow more deserving, then I have forgotten that it was mercy alone which saved me and mercy alone which keeps me there. Thus the more grounded we are in the knowledge of God's mercy toward us, the easier it is for us to maintain humility among our neighbors, regardless of how depraved we may be tempted to think they are...."
Lord willing, more answers coming soon.