How to get into Heaven is one thing…
But what must one do that would ensure 100% that one will go to Hell after one dies?
Without harming anyone, of course
Basically: what is the quickest and easiest way to guarantee damnation?
Eternal life is promised for righteous. So, to not get that one must be unrighteous. But I don’t know any good reason to be unrighteous.
These will go away into eternal punishment, but the righteous into eternal life.
Mat. 25:46