Tangential, but I recently read The Transmigration of Timothy Archer by Philip K Dick. It was one of his last books (and one of his best) and has a character inspired by Alan Watts. There's an interesting sequence where that character suddenly grasps the conceptual nature of reality at a deep level. He goes home to write it down, but sees two children playing in the street. He tries to explain to their mother that they're in danger, but she doesn't speak English. So he spends the rest of the afternoon watching the kids, and then forgets the epiphany he had.
> What I had acquired, there on that walk, out of my apartment where I had no access to pen and paper, was a comprehension of a world conceptually arranged, a world not arranged in time and space and by causation, but a world as idea conceived in a great mind, the way our own minds store memories. I had caught a glimpse of world not as my own arrangement—by time, space and causation—but as it is in itself arranged; Kant’s ‘thing-in-itself.’”
> What I had acquired, there on that walk, out of my apartment where I had no access to pen and paper, was a comprehension of a world conceptually arranged, a world not arranged in time and space and by causation, but a world as idea conceived in a great mind, the way our own minds store memories. I had caught a glimpse of world not as my own arrangement—by time, space and causation—but as it is in itself arranged; Kant’s ‘thing-in-itself.’”