Prayer can be a tricky thing, because there are passages that say do not doubt and believe you have received whatever you ask for and you will, but then Jesus prayed 'Not my will by thy will be done.'  Ultimately, we can't tell God what to do.  He will accomplish, in our lives, whatever He wants to accomplish.  God is God and we are not. 
Lisa Bedrick, Jesus, God and Us
faith, god, humility, jesus, prayer, pride, soverignty-of-god