I was going to mention the same thing. They didn't really change their religion. They still believe in a works based gospel. They still believe its the church and the power of the pastor that saves. And the catholic church is probably the closest out of the "christian" churches to the oldest work based religions.
I wish there was something I could say to help people trapped in this to understand. Your quote of proverbs seems like the best thing to say...
I do not know where you received your understanding of the faith of the Catholic Church, but we do not believe pastors save us or that our works save us.
Salvation is by grace alone through faith in Jesus Christ, any good works we do are through the grace of God. We do not believe we earn our salvation.
We do not believe in sola fide , sola scriptura which is what I assume you believe in.
We believe in grace alone , sacred scripture and sacred tradition as interpreted by the teaching authority of the Church.
We believe we receive the grace of God primarily through the sacraments of the church.
There is a great deal of misunderstanding of the Catholic Church on these threads and I am not here to set everyone straight. I believe many other faith traditions have received the grace of God through faith in Jesus Christ. It is my prayer that many would come to believe we are all members of the same body, which is Christ our Lord.
Christ be with you always.