Have you ever wanted something really bad and figured that you would pray for it knowing absolutely that it would be granted? God would definitely grant it because He's an all giving God. At least that's the way we see it in our selfish human eyes. What happens when he says no to our request? What is our first reaction? Is it anger, hurt or confusion?
It can be very frustrating to be told no.
Many godly people were told no in Scripture. Moses was a man of great faith, but he wasn't allowed to step foot in the Promised Land.