"Reality is that which, when you stop believing in it, doesn't go away." - Philip K. Dick
Philip K. Dick was a fascinating individual. In a fucked up way. I'm a huge fan though, because I found out he was the Sci-Fi author of SEVERAL awesome Sci-Fi movies. Minority Report. Blade Runner. Total Recall. A Scanner Darkly. The Adjustment Bureau. Even that TV Show on Amazon, The Man in the High Castle.
I recommend anybody that has watched these movies and enjoyed them to go on YouTube and watch a documentary about Philip K. Dick. He was more than a genius, he was practically a prophet of science. It's rather unfortunate that amazing things often come from people with fucked up lives. I can actually identify with how he went through a period of time where he felt like God was speaking to him and revealing to him alternate realities. I suffered from severe mania that lead to extreme sleep deprivation and strange thoughts. He probably had something closer to schizophrenia, but disorders of the brain often share similar symptoms.