>>40957915 (OP)
garden variety PKD chat usually centers around the concepts he explored in his books, being ahead of his time, and blah blah blah. the man was a method writer, as to method acting. to write paranoid fiction well, the author must themselves have experienced it and also came back. you can't do that gonzo, you have to be there first person.
for PKD, some of the more obscure stories about him are how he used to eat dog food all the time because it was cheap and he was a poor writer. iirc, it was between his marriages and during the time period he was running a flop house in the bay area. during that time, he most definitely lived all manner of altered states of consciousness either through drug use, chat with other philosopher types, seeing the effects on others, and all sorts of lab rat style observations of what happens to the human mind in different situations.
his situations involved time travel, drug use, surveillance, and all the typical stuff, but focusing more on the naked exposure of the mind shows up so often in his stories. ask yourself, why does it hit so fucking hard?
because he lived the life his characters. ex. Bob Arctor. did he have a flop house full of characters? did he get his home raided and safe broken by the authorities? was his house bugged? yes. was he identified as a force of culture by the CIA? all yes.
imagine having lived something like that yourself, or any of PKDs wild true stories, and trying to get people to believe you. you have to ficitonalize the experience. communications directly to the mind used to be angelic voices, but it doesn't matter because the only way to express the message is to fictionalize it.
in the end, the irony of PKDs books was that all of the paranoia of his characters, and himself in life, turned out to be true. for a clinical analysis of the more technical aspects of his stories, picrel and link below.
https://www.dukeupress.edu/the-technical-delusion