What a person believes in the heart, will govern their actions, and those action will manifest what is in their heart, this is why Jesus said: "Let your light shine" and people will glorify God, not you.
We have a local man, who is Catholic, and for 50+ years has visited the Hospitals, Nursing Homes, almost on a daily bases, everyone, without exceptions knows this man, including me.
We always "take a break" when we meet and talk, once he commented that he Hoped" he had done enough to be accepted into heaven when he died, I ask him if he believed in Jesus, he said: Oh yes!
It had never occurred on me that all these years he wasn't working because he was saved but because he hoped to be saved by his works, After explaining to him that faith in Jesus was all he needed to be saved, he answered: "I sure hope you're right".
The "peace with God" that comes with "knowing" you're saved only by faith in Jesus has been denied to this man all these years, living in a state of "limbo", always fearful of his spiritual condition, and why, Church doctrine.
You may not think doctrine matter that much, but as you see, doctrine can "detract" more from God/Jesus than it "adds too".