Susanna Kaysen said this quote

The debate was wearing me out. Once you've posed that question, it won't go away. I think many people kill themselves simply to stop the debate about whether they will or they won't. Anything I thought or did was immediately drawn into the debate. Made a stupid remark—why not kill myself? Missed the bus—better put an end to it all. Even the good got in there. I liked that movie—maybe I shouldn’t kill myself.

~ Susanna Kaysen

Was I ever crazy? Maybe. Or maybe life is… Crazy isn’t being broken or swallowing a dark secret. It’s you or me amplified. If you ever told a lie and enjoyed it. If you ever wished you could be a child forever. They were not perfect, but they were my friends.

~ Susanna Kaysen

Lunatics are similar to designated hitters. Often an entire family is crazy, but since an entire family can't go into the hospital, one person is designated as crazy and goes inside. Then, depending on how the rest of the family is feeling that person is kept inside or snatched out, to prove something about the family's mental health.

~ Susanna Kaysen

Kaysen elaborates through parts of the book on her thoughts about how mental illness is treated. She explains that families who are willing to pay the rather high costs of hospitalization do so to prove their own sanity. Once one member of the family is hospitalized, it becomes easier for the rest of the family to distance themselves from the problem and to create a clear boundary between the sane and the insane. Recognizing a family member or friend as insane makes others around them, says Kaysen, compare themselves to that individual. Hospitalization allows for distance from this questioning of self that makes us so uncomfortable. Her view that mental illness often includes the entire family means the hospitalized family member becomes an excuse for other family members not to look at their own problems. This explains the willingness to pay the high financial costs of hospitalization.

~ Susanna Kaysen