This type of faith is a supernatural faith that is given to those who have this gift. Holy Spirit plants it in our hearts, and gives us this little spark of hope in there with it. Think that is the fertilizer. Each day He is nurturing that little seed. Then He gives us the faith to speak it forth.
Miracles bring hope to mankind, stirring up the heart of man to repentance, or the new birth.
With this kinds of gifts of power, comes much responsibility, testing and more fires to go through. God does not give this kind of faith for it to be abused by someone greedy for power and for the glory. I believe these gifts are given to those who are humble and meek before Him, and that will glorify his name, and give Him the glory when the miracle occurs. God will only give these power gifts I believe to those who have walked for a while, tried through the furnace. Suddenly what seemed to impossible last week, is suddenly possible.