7 remedies for a house divided

In one of the Eucharistic Prayers, we ask God that “in a world torn by strife, your people may shine forth as a prophetic sign of unity and concord.” If we live our faith, Christians have the numbers — not to mention supernatural resources — to be that sign, but to do so will require courage, magnanimity and perseverance, and likely suffering and sanctity, as well. If Catholics in particular are going to become part of the remedy, what are the virtues needed?