I’m reading VALIS by Philip K. Dick.

“Basically, Sherri’s idea had to do with bringing Fat’s mind down from the cosmic and the abstract to the particular. She had hatched out the practical notion that nothing is more real than a large World War Two Soviet tank.”

“Fat realized that one of two possibilities existed and only two; either Dr. Stone was totally insane – not just insane but totally so – or else in an artful, professional fashion he had gotten Fat to talk; he had drawn Fat out and now knew that Fat was totally insane.”