Prayer changes things. It has a lasting impact on the one who is praying, and it affects everyone else as well. We don't see all that prayer accomplishes in the world, but God does. We may never know how much prayer means to someone, but it means a great deal. The Bible teaches us to pray, and it is filled with the prayers of saints down through the ages. God answers prayer, and it is written: The fervent, effectual prayer of the righteous availeth much.