My 2 cents, I'd just like to voice my opinion and reasoning of what I believe so I don't sound like an splode, I'll actually tell you why I believe what I believe.
A "god" was invented and people started to believe the idea because people were too scared that when they died, it'd be it, there'd be NOTHING, they'd be erased from the Earth, they wouldn't be living. They wanted a life after death and so the invention of a place called "heaven" became popular. That's all. A place in sky where you go where you die? I praise the person who invented this for being so creative but yeah... sorry, we've gone up into the sky, surrounding us is a solar system, the sun, planets, galaxies. No Heaven. So... it's not in the sky... is it a part of someone's imagination, like, just in their heads? When they die? If yes, then you've admitted Heaven/God isn't real. And you can't imagine things when you're dead, simply, because you're not living. In my opinion, there's nothing when you die, you're dead. You don't float to heaven, you rot.
If my opinion is too harsh Lieuts+, you may remove it. Up to you, just my opinion.