22 But the fruit of the Spirit is love, joy, peace, longsuffering, kindness, goodness, faithfulness, 23 gentleness, self-control. […]
In Gal 5:22 πίστις (G4102) – “pistis”, or faith (you can call it “faithfulness” as long as you understand that it’s the same exact word that’s translated “faith” just about everywhere else) is listed as the fruit of the spirit. So is love, joy, peace, etc. All those things are what my spirit produces as fruit. Meaning the Christ-kind-of faith faculty is there, and if exercised correctly, is able to produce in no worse a way that the faith of Christ himself produced when he walked on this Earth.