If you are physically sick, you can elicit the interest of a battery of physicians; but if you are mentally sick, you are lucky if the janitor comes around. – Martin H. Fischer (1879–1962)

Temporary madness may be necessary in some cases, to cleanse and renovate the mind; just as a fit of illness is to carry off the humours of the body. – Augustus William Hare and Julius Charles Hare, Guesses at Truth, by Two Brothers

You should listen to your heart, and not the voices in your head. – Matt Groening, The Simpsons, spoken by the character Marge Simpson