I. God has endued the will of man with that natural liberty, that is neither forced, nor, by any absolute necessity of nature, determined good, or evil.[1]
II. Man, in his state of innocency, had freedom, and power to will and to do that which was good and well pleasing to God;[2] but yet, mutably, so that he might fall from it.[3]
III. Man, by his fall into a state of sin, has wholly lost all ability of will to any spiritual good accompanying salvation:[4] so as, a natural man, being altogether averse from that good,[5] and dead in sin,[6] is not able, by his own strength, to convert himself, or to prepare himself thereunto.[7]
IV. When God converts a sinner, and translates him into the state of grace, He frees him from his natural bondage under sin;[8] and, by His grace alone, enables him freely to will and to do that which is spiritually good;[9] yet so, as that by reason of his remaining corruption, he does not perfectly, or only, will that which is good, but does also will that which is evil.[10]
V. The will of man is made perfectly and immutably free to do good alone in the state of glory only.[11]
Then which Protestants teach about "saving faith"? Apparently, some do not have "saving faith".
Paul in 1 Cor 13:3 talks about faith as measurable, as well, or at least in varying degrees - when he writes that faith ENOUGH to move mountains. This tells us that there is faith NOT ENOUGH to move mountains. Jesus ALSO tells the Apostles that they have insufficient faith, esp. in Mark's Gospel. People cry to Jesus "Lord, increase my faith".
It seems that faith is not either "ON" full blast, OR "OFF" nothing at all. Faith is a virtue that is present in various degrees in individuals, based on that person's sanctification and openness to God's graces.
Regards