Can you show me a verse where Christ said that what a man does is what saves him?
Pardon me for interjecting. I’m sure you will get several; the unfruitful fig tree comes to mind. Also when Christ spoke to the good, believing follower and told him he needed to DO more by leaving his family and following Him. The many times Christ talked about having to TAKE UP the cross and FOLLOW Him. These comments all highlight the importance of what we DO. Backsliders have a problem.
But I wanted to add these: In Revelations 20:12 we learn that in Heaven there is a book of life and the dead are judged by what they’d DONE (not believed, but done). We also hear in Revelations 14:13 that “their deeds follow them.”