the movie quotes a couple scriptures, so lets look at them. First is mentions Mark 11:24. Lets looks at Mark 11:20-25 to see what is being said here:
The kind of prayer that moves mountains is prayer for the fruitfulness of God's kingdom. It would seem impossible to move a mountain into the sea, so jesus used that picture to show that God can do anything. God can, and will, answer you prayers, but not as a result of your positive mental attitude. Other conditions must be met:
You must be a believer. (See beginning of vs 22-were those rolling the dice merely conducting an experiment, or were they believers in Christ?);
you must not hold a grudge against another person. (vs 25);
you must not pray with selfish motives. Jesus himself showed us this when he prayed before he was caught to be crucified- Mark 14:36-
Your request must be for the good of God's kingdom. Was the outcome of a dice role for the good of anyone but the one who was rolling the dice?
To pray effectively, you need faith in God, not faith in the object of your request. If you focus on your request, you will be left with nothing if your request is refused.
The other verse it mentions is John 14:14. so lets look a little bigger look at it with vs. 12-14.
here, when Jesus says that we can ask for anything, he reminds us that it must be in his name- that is, according to God's character and will. God will not grant requests contrary to his nature and his will, and we cannot use his name as a magic formula to fulfill our selfish desires. If we are sincerely following God and seeking his will, then our requests will line up with what he wants, and he will grant them.
Now, to my thoughts on prayer- to me, prayer isn't about me trying to change God's mind. It is about God changing my mind to be more like his. Sure I can pray for a new Mustang convertable, but if that isn't what God wants for me, then why do I want it? Sure it would be nice to drive, but ultimately it is just my selfish desires that want the new car, not me wanting to glorify God with it. God doesn't us to participate in religion, he wants relationship with us. There is a difference. When we are praying and seeking his will, that relationship will grow, and we will see more of his will in our prayers.