"Grace is not a reward for faith; faith is the result of grace." - John Blanchard
"Saving faith is not a native product of the human heart, but is a spiritual grace communicated from on High." - A.W. Pink
"Faith is a flower that grows not in the field of nature." - Thomas Boston
"It is not faith that saves, but faith in Jesus Christ.... It is not, strictly speaking, even faith in Christ that saves, but Christ that saves through faith. The saving power resides exclusively, not in the act of faith or the attitude of faith or in the nature of faith, but in the object of faith." - B. B. Warfield
“Biblically speaking, faith is trust-filled surrender to God and His word of promise. In the new Testament, this trust involves acceptance of the apostolic witness concerning Christ and personal trust in Christ as Savior and risen, exalted Lord. In church history, however, as is the case of Rome, faith was often reduced to intellectual assent. Personal assurance was decidedly secondary and often lost altogether. For Calvin, faith was personal confidence in God’s benevolence towards us “revealed to our minds and sealed on our hearts” by the Holy Spirit. The Reformation, however, did make it clear that knowledge was not to be set aside. Knowledge and trust, intellect and will, were both included in the understanding of faith.” - Herman Bavinck
Faith is the principal work of the Holy Spirit (Institutes 3.1.4).
Faith is the proper and entire work of the Holy Spirit (Institutes 3.1.4).
We cannot quicken faith in ourselves or predispose ourselves for it in any way. There is not in us any commencement of faith or any preparation of it.
John Calvin,Commentary John 6:45
Is faith a gift? Jesus declares, "No one can come to Me unless it is granted him by the Father" (John 6:65). In the same passage Jesus declares, "All that the Father gives to Me will come to Me" (John 6:37). In both verses the phrase "come to Me" simply means "believe in Me" and so taken together Jesus is stating that no one can believe in Him unless God grants it, and all to whom God grants it will believe" According to this passage, then, God grants faith, a faith that will infallibly arise in the heart of those He has given His Son.