For every verse like that, I can quote you one that makes it clear actions play the ultimate role in salvation. The New Testament is rife with passages indicating that one must live Christ’s words, not just talk about them.
If mere belief was enough for salvation, why would Paul write to various groups of converts cautioning them that they were on the wrong track? Weren’t they “saved” by virtue of being Christians? No. He wrote because they were in jeopardy of losing their salvation by improper beliefs, misunderstandings, and impure acts.
In other words, their actions were not in keeping with belonging to Christ. Paul seemed to think that was pretty serious!
Paul was not ashamed of his cause in 2 Timothy 1:12. His cause was to bring souls to Christ. He is asserting his faith and trust in Christ’s love and mercy. But in other passages he is very clear that those who don’t live Christ’s message are in jeopardy- even if they are Christians.
If you wish to take the time then I would be interested in hearing/reading a few.