There is an odd phrase in St. Paul that has long been debated by scholars. Romans 1:17 -
For therein is the righteousness of God revealed from faith to faith.
Paul seems to be saying that there is a kind of preliminary faith through which we are led to a deeper faith, in which the righteousness of God is revealed.
What, then, is this original faith? What is the first faith in "from faith to faith"?
Paul tells us right away, as he describes, by contrast, those non-Christians who have no original faith - that is to say who have no "good faith" and who approach the world in "bad faith". These are the unbelievers whose hearts are closed to belief, who see the evidence of God in the world around them, and who therefore know God at least in some inchoate way, but who neither glorify nor thank this not-yet-fully-known God. And though they have at least an inkling of Him, they become "vain in their imaginations", becoming fools with dark hearts who trade the source of creation for some petty part of creation that they worship in His stead. And, as Paul points out, with great psychological and spiritual insight, such folk of "bad faith" descend into a kind of ridiculousness and perversion.
Having been an atheist myself at a young age, I can attest to this. My atheism was not really an intellectual position - it was an exercise of ill will. It was crankiness. It was anger and disappointment. It was not a "good faith" philosophy, for it refused to acknowledge the truth and asserted instead the bile of my own dark heart.
We see this all the time, especially on the internet. Rarely will you find people arguing any subject in "good faith". Instead, you find people doing somersaults to justify their sins, and the venom that springs forth is called "argumentation". But it is not that. It is simply communication in "bad faith".
When (through drama) I began to see the mystery beyond my own petty tyranny, I began to approach the world in "good faith", which by the grace of God led, eventually, to the True Faith, the Catholic Faith.
At least in my case this was the meaning of "From Faith to Faith".