There are a lot of things which seem to us to be wrong, or evil, or contrary to the will of God. It's asking God to change the world. That's what a miracle means. And it's saying that we are willing to do whatever it takes, in order to go along with what God wants. You see, it's one thing to pray the Lord's Prayer as a child, with all of the trust and simplicity and confidence of a child.
Children are beautiful.
But it's another thing to pray the Lord's Prayer as an adult, and to realize the cost and the consequences of what it is that we're praying for. Jesus is telling us to pray for what God wants. That's one of the deepest, most adult prayers there is. It was also Jesus' prayer in Gethsemane. It's a prayer of faith.