The Catholic teaching firmly states that justification is a process. I’m on my phone so can’t easily copy selections of texts like you are.
Maybe you are getting initial justification and progressive justification mixed up. Prior to justification, we can do nothing. We are without God’s grace. We get into a state of justification, ordinarily, when we repent, believe, and are baptized. In general, we receive God’s grace when we choose to align ourselves with his will, by the prompting of his grace. Works of any kind do not get us into a state of justification. Paul is clear “for grace you have been saved… Not of your own doing.” Once in a state of justification, we can grow in that state, since the Catholic understands justification to be an actual, inner change, where we become partakers of the divine nature, become a “new creation,” and have the Spirit of God and virtue of charity in us. If justification is like this, which I believe the New Testsment and early church teaches, as do the Orthodox churches who are just as ancient, then it naturally follows that justification/salvation is a process and not a single event.
Faith alone DOES NOT justify it is the virtue of faith (traditionally defined) is alone. Paul and the NT in various places distinguishes faith, hope, and love. The Protestant (or certain kinds) may well say that intellectual assent alone does not justify. GOOD: The Catholic agrees. But the issue then becomes - do good works justify at all? NO! – IF* we use the usual Protestant understanding that justification is a single and initial event in the life of the believer. But Catholics believe in a progressive justification. In the Catholic view, (1) justification is not so sharply distinguished from sanctification and (2), good works actually contribute to our relationship with God.
Good works strengthen us, make us grow closer to God in quality. It’s not as if there is a certain number of good works you have to do for salvation. Good works in that sense are not necessary. But just as Abraham was justified by his good work, as James clearly says, so is the believer justified in good works done with God’s grace: That is, our progressive relationship with God is increased.