a.) A place or state-of-mind or whatever that was made up by people that thought felt that the good feeling they got when they did something good wasn't enough.
b.) A place or idea used to bribe others into believing what you believe
a.) I have yet to kill anyone, surely there will be a great reward for this after I die, I think I'll call it Heaven
b.) If you follow Jesus Christ, you will go to Heaven.
a fictional place that was made up by people that wanted wrong-doers to be punished eventually. Fulfills those peoples' desire for revenge on the wrongdoer.
Priest: That guy just stole my car. He'll burn in Hell for that
one of the many poisons of our society, used by people to escape reality.
I just lost my job, I need a beer.