From another BRI book, here's a collection of quotes all about crazy:
"We're all crazy and the only difference between patients and their therapists is the therapists haven't been caught yet." - Herman Hesse
"Insane people are always sure that they are fine. It is only the sane people who are willing to admit that they are crazy." - Nora Ephron
"Do you know what crazy is? Crazy is majority rules!" - Jeffrey Goines
"When we remember we are all mad, the mysteries disappear and life stands explained." - Mark Twain'
"I don't buy temporary insanity as a murder defense. Breaking into someone's house and ironing all their clothes is temporary insanity." - Sue Kolinsky