“Anyone can be crazy. That's usually just because there's something screwed up in your wiring, you know? But suicide is a whole different thing. I mean, how much do you have to hate yourself to want to just wipe yourself out?”

Introduction to Treasury of the Free World (1946)

Variant: Because he knows you have to laugh at the things that hurt you just to keep yourself in balance, just to keep the world from running you plumb crazy.
Source: One Flew Over the Cuckoo's Nest (1962), Ch. 25
Context: While McMurphy laughs. Rocking farther and farther backward against the cabin top, spreading his laugh out across the water — laughing at the girl, at the guys, at George, at me sucking my bleeding thumb, at the captain back at the pier... and the Big Nurse and all of it. Because he knows you have to laugh at the things that hurt you just to keep yourself in balance, just to keep the world from running you plumb crazy. He knows there's a painful side; he knows my thumb smarts and his girlfriend has a bruised breast and the doctor is losing his glasses, but he won't let the pain blot out the humor no more'n he'll let the humor blot out the pain.

Thuy Trang Interview (Encyclopedia of Martial Arts: Hollywood Stars) https://www.youtube.com/watch?v=MwNZAqDAFng&t=54s&ab_channel=DietColaTime (1995)

"Alex Jones' Profanity Laced Rant, Loses $5M. Response to Being Banned from AdRoll, Google!" https://www.youtube.com/watch?v=bSEnb8d7igk, Studious Dunce, February 21 2017
2017

In an interview (March 1960) with David Sylvester, edited for broadcasting by the BBC first published in 'Location', Spring 1963; as quoted in Interviews with American Artists, by David Sylvester; Chatto & Windus, London 2001, p. 54
1960's

On guitar solos, in an interview in Time, quoted in Classic Albums: Pink Floyd – The Making of The Dark Side of the Moon (2003)

Letter to Groucho Marx.

Academy of Achievement Interview (1996)