I don’t believe I have said anyone is not going to heaven. You are right, that is God’s domain.
But the bible clearly states we can judge teachings to be correct or not. The bible is also clear on it’s teachings about salvation. So, put those two together and we can know and accept or reject as true or false things that are taught.
Motive is the key. Why do Catholics partake of their sacraments?
>>But the bible clearly states <<
Your interpertation of the Bible.
Mine is different.
You can’t prove yourself absolutely right, I can’t prove myself absolutely right either.