Haha, I should add a part about not overthinking, it gets you into trouble!!! Unless it's already in there...
On the converse, overthinking would bring you to a higher state of wisdom, and then maybe you would see the ghosts!
Haha, I dunno mate... I just know that there are ghosties of sorts, just that they are not something that Hollywood makes them out to be. They can't touch you, and you can't touch them... maybe the live in a different dimension that is in the same spot as ours, and every once in a while the dimension thins out and a ghost pops here for a second. Interesting points are there to be made.
However, one of my favorite questions is one that I made up when I was 7 years
old. Hypothetically (sorry ajc), imagine that you have built a spaceship that you can go in, and it travels several times faster than the speed of light. Now, as most of us know, the universe is expanding at an extremely quick rate. So what would happen if we drove our space ship so far that it hit the edge of the universe?
There has to be an edge, because the universe is getting pulled apart... so what happens when you go to the edge, and then hit it? Is that "heaven"? Is that a higher state of being? Take a moment and think about it.