This is a quote from Ragamuffin Gospel that is itself taken from a writer named Jaroslav Pelikan:
Luther suddenly broke through to the insight that the “righteousness of God” that Paul spoke of in this passage was not the righteousness by which God was righteous in himself (that would be passive righteousness) but the righteousness by which, for the sake of Jesus Christ, God made sinners righteous (that is, active righteousness) through the forgiveness of sins in justification. When he discovered that, Luther said it was as though the very gates of Paradise had been opened to him.
Manning’s comment is: “What a stunning truth!” (p.20)
And he continues on page 20. “Justification by grace through faith” is the theologian’s learned phrase for what Chesterton once called “the furious love of God.”
I believe the orthodox Catholic position would actually be “justification by grace through faith plus works.” (Read Salvation Controversy by Jimmy Akin for a discussion on Faith plus Works versus Faith alone.)
Also here’s a quote from a man named Robert Capon on page 21 of Ragamuffin Gospel:
The Reformation was a time when men went blind, staggering drunk because they had discovered, in the dusty basement of late medievalism, a whole cellarful of fifteen-hundred-year-old, two-hundred-proof grace–of bottle after bottle of pure distillate of Scripture, one sip of which would convince anyone that God saves us single-handedly. The word of the gospel–after all those centuries of trying to lift yourself into heaven by worrying about the perfections of your bootstraps–suddenly turned out to be a flat announcement that the saved were home before they started. . .
Here’s a quote from Brennan himself on page 20, “False gods—the gods of human manufacturing—despise sinners, but the Father of Jesus loves all, no matter what they do.”
Of course God loves all people, no matter what. . .but that doesn’t answer the question of how we must live to end up with God in heaven. Brennan makes it sound like salvation is automatic.
He NEVER addresses the problem of sin in his books.
HOW can that be orthodox Christianity?
I don’t think it is, but you can judge for yourself.