Think how painful and unbearable your life will be. Then follow that misery with eternity in hell. Dont take that mark.
This is meant to compel belief in the Lord by fear? That will not last to eternity. Love will. Love the Lord and love the neighbor. Living a good life as the Lord taught us will.
It worked for me. I became a believer shortly after learning about the end times prophecy. That was almost 40 years ago.