The faith of each member is a gift of God. The faith that we have is actually a gift of God. The Lord not only saved us, He also graciously gave us the very faith we needed in order to receive the salvation. It is surely all of Him. We would never have come to such faith on our own.
Some believers have a greater faith.
The gift of faith goes beyond the saving faith that brought a person into the family of God, and even beyond the growing faith marking the mature believer. God gives this faith to the believer so that some unusual thing may be made possible in the body. The person with this gift is able to believe God for something that is vitally important, something that God alone can do. They use the greater faith to sustain the ministry of the body. They express it in their prayers.