How come you have a question mark at the end? Justification is indeed by faith alone BECAUSE it is purely by God's grace. The Catholic Church hates this doctrine (and does not even use the word "justification" properly). (And several other groups of Christians do too).
Their reasoning goes like this: "How in the world could a holy God declare a vile sinner to be righteous (justified) merely because he or she has believed on the Lord Jesus Christ? That is absurd! There are no free lunches! How in the world could God give a murderer the FREE GIFT of eternal life because he has repented and genuinely turned to God and Christ? That's not fair!"
But that is exactly what the Bible says. So those who cannot believe this fundamental truth do not believe God.
Yes,one who says repentance is a work says you are not saved if you believe it is necessary for salvation. This was my experience in a Christian ministry I was a part of in college.
But those who see repentance as a gift say if you do not believe it is necessary for salvation, you are not saved. That is my church teaching.
I can see the repentance gift as change of mind and the action as a work. Because thoughts lead to actions.
Just people I care about are on both sides and it is hard to think one side or the other is not saved. Then there is me, who has never heard repentance is a gift, not a work. Or so it seems like! So it boggled my mind a second. But I believe I know where I stand. I believe if you have a relationship with Jesus Christ that He died for Your sins, then you don't have to worry about anything else. He will guide Your way. The Gospel was meant to be simple enough for just a child to understand.