Luke 12:10 And everyone who speaks a word against the Son of Man will be forgiven, but the one who blasphemes against the Holy Spirit will not be forgiven.
I can’t get any plainer than that. Don’t grieve the Holy Spirit. Don’t blaspheme the Holy Spirit. Don’t deny the Holy Spirit.
All other sins are forgiven. Completely and forever.
So what you are saying is that you, as a Reformed believer, could rape 1000 women, kill 1000 men, steal millions of dollars, drop atomic weapons, infect millions of people with AIDS, put thousands of people in jail on false charges, and violate every single temporal and moral law that you know of and you would still go to heaven?