If you've ever read the book or watched the movie, there is a scene in The Lord of the Rings where the whole group is stuck in front of a door while they try to figure out the magic words to open the door. Of course, while they are waiting, danger lurks. And soon after they enter, they are very aware that there is more danger inside. Jesus uses the picture of a closed door to invite people to pray. His words focus on the hope we all have that our prayers will be answered, which He compares to a door being opened. But sometimes, people think they have to find the 'magic' words to get their prayers answered. Jesus wants us to know that it doesn't work like that. He wants to teach us about how confident we can be that our prayers will be answered, and that God will do good for us.