A function on the behalf of the believer to perform something impossible by ordinary human efforts. God intervenes with his sovereignty and glory to work this miracle for us. See Matthew 8:1-3, John 9:1-7, and Acts 16:16-18.
The gift of faith is the supernatural ability to believe God without doubt, combat unbelief, and visualize what God wants to accomplish. It is not only a inner conviction impelled by an urgent and higher calling, but also a supernatural ability to meet adverse circumstances with trust in God's words and messages.
Through studies, the Bible speaks of several types of faith which increase from Faith to Faith Romans 1:17. Saving Faith, Ephesians 2:8-9 ~ This is Faith which gets you into Heaven. Then there is Fruit of Faith, Galatians 5:22-23 ~ This is Faith which gets Heaven into you. Then there is the Gift of Faith, II Thessalonians 1:3 ~ This Faith stems from saving Faith and the Fruit of Faith; it is the ability to believe for the miraculous. This gift not only operates in healings and in miracles, but in the realm of the impossible as well. Saving faith produces the active faith of the fruit of the Spirit which, in turn, produces the gift of Faith. When the gift of Faith is empowered, the results are miraculous!