Baldwin did a good thing, became a Christian, and the author is happy about that. Now we all want Baldwin to come to the true and authentic Christianity of the Catholic Church so that, now that he is interested in saving his soul, he has a sure way to actually do it.
True and authentic christianity is between the believer and God. You can go to any church, Catholic or not, and not be a Christian. God knows His own and His sheep hear His voice. Church is desirable for sure, but it doesn’t make you a Christian just by being part of it.
OK, now I’m REALLY confused. You mean when Jesus died and said “it is finished”, it was not? What more is there to do than is indicated in Romans 10:10:
Romans 10:10 (New International Version)
New International Version (NIV)
Copyright © 1973, 1978, 1984 by International Bible Society
For it is with your heart that you believe and are justified, and it is with your mouth that you confess and are saved.