Jesus replied, "I tell you the truth, if you have faith and do not doubt, you can say to this mountain, ‘Go, throw yourself into the sea,’ and it will be done. (Matthew 21:21)
There is great power in faith, but it’s not a power we can control. Taken out of context, it would seem this verse says we can cause anything to happen as long as we have a doubt-free faith.
But faith is more than personal desire. Faith is not ours to make with it what we want. Instead of pointing in the direction of personal wish-fulfillment, this verse indicates that when we have the faith of Christ, we can participate with him to accomplish God’s will, no matter how great the task.
The outcome of faith may not even be something we desire. A man named Mason Cooley put it this way -
"Faith no doubt moves mountains, but not necessarily to where we want them." (Mason Cooley)