I have always wondered if the world around us is as it is. Physically, everything appears as it does only because of the type and method of our eyes and brain. But perhaps life is a trick or a game, where the players are the ones in the dark.
I also question if our dreams and thoughts are any less real than reality. In fact I wonder where they take place? Is there somewhere in the universe where all thoughts and dreams play out endlessly?
The Hitchhiker's Guide to the Galaxy highlights human obsession with questions without answers. The Philosophers in the book are outraged that the most elemental questions might be given a definitive
"I mean what's the use of our sitting up half the night arguing that there may or may not be a God if this machine only goes and gives you his bleeding phone number the next morning?"