Prayers can move mountains.

this is the confidence we have in approaching God, that if we ask anything according to his will, he hears us. and if we know that he hears us - whatever we ask - we know that we have what we asked of him." No matter the person praying, the passion behind the prayer, or the purpose of the prayer - God answers prayers that are in agreement with His will. his answers are not always yes, but are always in our best interest. when our desires line up with His will, we will come to understand that in time. when we pray passionately and purposefully, according to God's will, God responds powerfully!

Dont think this as physical thing. This does not mean that when you pray in front of the mountains, you can move the mountains to any direction. No, no matter how long and deep you pray, it wont move. But it means that prayer can do all sort of things that you will not expect and will do imposiblem things in the eyes of human. as we know, whats not possible for us is so possible for God, so if we pray, all the imposible things can be done But you gotta have faith in What you are praying for and believe that you have received it in order for the prayer to work

To move mountains is an impossible task, prayers can move mountains means that prayers can do the impossible things.( things which a human mind things not workable)