Thank you for the question, “If you already knew that everything in the Bible was true because you had previous information because it was it allowed you to know that it’s true and you’re still an earth right now how can I help my fellow brothers and sisters?”
Here my thoughts for one’s consideration:
The person who has the knowledge has the obligation to warn people of the impending danger.
The guiding principle is not just about Bible truths but truths in general. Most of us already know about the danger of alcoholism, drug addiction, STD, texting while driving, etc. That “advance” knowledge should cause us to warn that person to stop doing it for it is endangering one’s health and it may have devastating effects on others.
Personally, I would do my best to persuade a friend who is drunk not to drive home. I would be glad to drive him home, but if he insists on driving, I would not get into the car with that person. I might even consider reporting him to the police for his well-being and the safety of others.
That same principle would apply to the Bible that if I believe that there is salvation, I would be morally obligated to share that with others. If I would warn my friend about physical and health dangers, shouldn’t I warn them about spiritual dangers?
I would not be a true friend if I remained silent and see that person “crash and burned” in a car accident, in a drug rehab center, or worse in prison. I would hate to hear that person say to me, “Why didn’t you say something or stop me from doing it?” when I had the opportunity to warn or deter that person.
If after that person ignores or shrugs it off, then it is on him/her, not on me. He made his/her choice. Hopefully, I will be there for him/her and not abandon that person when everything goes wrong for him/her.
SUMMARY: If we know the truth and remain silent, aren’t we culpable as well?