Add faith to hope and it will begin to take on substance. What things soever you hope for when you pray, believe. Your believing will give your desires substance. But if you ever give up hope, faith has nothing to feed. You can have all the faith in the world and nothing will happen.
Faith is a product of the inner man.
If you are born of God, the devil can't get to your spirit because your spirit is indwelt by the Holy Spirit. Now the devil can get to other parts of you, but he can't get to your spirit. However, faith needs to cooperate with other powers to operate. The devil can get to your hope, and if he does your faith will not function. The devil begins to work on your hope.