Ever notice that the King James Version in several places talks about us having the faith OF Jesus rather than faith IN Jesus, as translated in other versions. In this case, I believe the KJV is correct. Compare this with Romans 3:22: “This righteousness of God comes through faith in Jesus Christ to all and upon all who believe, for there is no distinction. ” Here is a good quote that explains Faith OF and faith IN Jesus:
“Look at Galatians 2:16: a man is not justified by the law ‘but by the faith OF Jesus Christ, even as we have believed IN Jesus Christ, that we might be justified by the faith OF Christ‘ (KJV). There it is. Galatians 2:16 and Romans 3:22 cohere perfectly: we believe IN Jesus Christ in order to be saved by the faith OF Jesus Christ.
What is Paul’s point? The meritorious cause of salvation is Christ’s own faith. The reason, then, that Paul said that the righteousness of God is “from faith to faith” (Rom.1:17) is because our faith must be ratified by His faith – or we will not be saved.” ~ T.R. Kendall.