We've been debating in the another thread about whether prayer can bring comfort to teenagers who might be stressed about their exams. One poster suggested widening the subject to ask about the power of prayer in general.
So, could someone explain more to me about the power of Christian prayer? If prayer 'works', does that mean that God brings extra comfort for people who've been prayed for compared to those who haven't? Why does God need prayer to do this? Why wouldn't He do it anyway?