A means of grace...

"Let us look upon every brother who tries or vexes us as God's means of grace, God's instrument for our purification -an opportunity for our exercise of the humility Jesus our Life breathes within us. And let us have such faith in the All of God, and the nothing of self, that, as nothing in our own eyes, we may in God's power only seek to serve one another in love."-Andrew Murray Humility

This includes bad drivers, disobedient children, difficult friends, family, people we don't understand...