Susan Cheever, "A Designated Crazy," The New York Times Book Review, June 20, 1993. (Reviewing Kaysen's Girl, Interrupted.)
On Girl, Interrupted
Quotes about crazy
page 2

“Those nuts that burn their bras and walk around all disheveled and hate men? They’re crazy. Crazy.”
Fallaci interview (1973)

Other

Apple Inc. "Think different" advertising company.
2000s

Source: Jack: Straight from the Gut (2001), Ch. 24.

Comment on Stahl interview in Madam Secretary (2003), pp. 274-275
2000s

“It's not doubt that drives people crazy, it's certainty that does.”
Un chagrin de passage (1994, A Fleeting Sorrow, translated 1995)

The Time Finally Comes for Anastacia http://www.pauseandplay.com/the-time-finally-comes-for-anastacia/, PauseandPlay.com, April 9, 2000.
General Quotes

"Antigun Activist David Hogg Attacks Infowars For Gay Frogs" https://www.youtube.com/watch?v=AN4pTxI12Hc&feature=youtu.be&t=19m59s, The Alex Jones Show, March 2018.

“It’s certain that fine women eat
A crazy salad with their meat
Whereby the Horn of plenty is undone.”
St. 4
Michael Robartes and the Dancer (1921), A Prayer For My Daughter http://poetry.poetryx.com/poems/1421/

Said to Wolfgang Pauli after his presentation of Heisenberg's and Pauli's nonlinear field theory of elementary particles, at Columbia University (1958), as reported by F. J. Dyson in his paper “Innovation in Physics” (Scientific American, 199, No. 3, September 1958, pp. 74-82; reprinted in "JingShin Theoretical Physics Symposium in Honor of Professor Ta-You Wu," edited by Jong-Ping Hsu & Leonardo Hsu, Singapore; River Edge, NJ: World Scientific, 1998, pp. 73-90, here: p. 84).
Your theory is crazy, but it's not crazy enough to be true.
As quoted in First Philosophy: The Theory of Everything (2007) by Spencer Scoular, p. 89
There are many slight variants on this remark:
We are all agreed that your theory is crazy. The question which divides us is whether it is crazy enough.
We are all agreed that your theory is crazy. The question is whether it is crazy enough to be have a chance of being correct.
We in the back are convinced your theory is crazy. But what divides us is whether it is crazy enough.
Your theory is crazy, the question is whether it's crazy enough to be true.
Yes, I think that your theory is crazy. Sadly, it's not crazy enough to be believed.

Linus Torvalds - Slashdot Interview, Torvalds, Linus, 2012-10-11, 2012-10-11 http://meta.slashdot.org/story/12/10/11/0030249/linus-torvalds-answers-your-questions,
2010s, 2012

Tunnel of Love, written with Richard Rodgers and Oscar Hammerstein II
Song lyrics, Making Movies (1980)

As quoted in Aikido Shugyo (1991) by Gōzō Shioda, p. 79

Source: As quoted in Rolling Stone (7 January 1971) , and requoted in The Sociology of Rock by Simon Frith, 1978 ISBN 0094602204

Satchmo: My Life in New Orleans (1954)

"The Summer of the Beautiful White Horse".
My Name Is Aram (1940)
Context: One day, back there in the good old days when I was nine and the world was full of every kind of magnificence, and life was still a delightful and mysterious dream, my cousin Mourad, who was considered crazy by everybody who knew him except me, came to my house at four in the morning and woke me up by tapping on the window of my room.
"Aram," he said.
I jumped out of bed and looked out the window.
I couldn't believe what I saw.
It wasn't morning yet, but it was summer and with daybreak not many minutes around the corner of the world it was light enough for me to know I wasn't dreaming.
My cousin Mourad was sitting on a beautiful white horse.

The Catcher in the Rye (1951)
Context: Anyway, I keep picturing all these little kids playing some game in this big field of rye and all. Thousands of little kids, and nobody's around — nobody big, I mean — except me. And I'm standing on the edge of some crazy cliff. What I have to do, I have to catch everybody if they start to go over the cliff — I mean if they're running and they don't look where they're going I have to come out from somewhere and catch them. That's all I'd do all day. I'd just be the catcher in the rye, and all. I know it's crazy, but that's the only thing I'd really like to be. I know it's crazy.

Speaking after receiving a German media prize award in Baden-Baden, Germany on May 25, 2017. Source: Kirschbaum, Erik (25 May 2017). " In Berlin, Obama speaks out against hiding behind walls https://web.archive.org/web/20170527213811/http://www.nasdaq.com/article/in-berlin-obama-speaks-out-against-hiding-behind-walls-20170525-01010". Reuters via nasdaq.com. Archived from the original http://www.nasdaq.com/article/in-berlin-obama-speaks-out-against-hiding-behind-walls-20170525-01010 on 27 May 2017. Retrieved 27 May 2017.
2017
Context: We can find people on the internet who agree with our ideas, no matter how crazy. Democracies do not work if we are not operating on some level based on reason and fact and logic - and not just passion. We're going to have to find ways to push back on propaganda and listen to those we don't agree with.

“Apparently, even crazy people prefer targets that can't shoot back.”
"Let's Make America a 'Sad-Free Zone'!" (18 April 2007).
2007
Context: Apparently, even crazy people prefer targets that can't shoot back. The reason schools are consistently popular targets for mass murderers is precisely because of all the idiotic "Gun-Free School Zone" laws.
From the people who brought you "zero tolerance," I present the Gun-Free Zone! Yippee! Problem solved! Bam! Bam! Everybody down! Hey, how did that deranged loner get a gun into this Gun-Free Zone?

“The viceadmiral thought his son crazy; but soon discovered he was a Quaker.”
The History of the Quakers (1762)
Context: William Penn, when only fifteen years of age, chanced to meet a Quaker in Oxford, where he was then following his studies. This Quaker made a proselyte of him; and our young man, being naturally sprightly and eloquent, having a very winning aspect and engaging carriage, soon gained over some of his companions and intimates, and in a short time formed a society of young Quakers, who met at his house; so that at the age of sixteen he found himself at the head of a sect. Having left college, at his return home to the vice-admiral, his father, instead of kneeling to ask his blessing, as is the custom with the English, he went up to him with his hat on, and accosted him thus: "Friend, I am glad to see thee in good health." The viceadmiral thought his son crazy; but soon discovered he was a Quaker. He then employed every method that prudence could suggest to engage him to behave and act like other people. The youth answered his father only with repeated exhortations to turn Quaker also. After much altercation, his father confined himself to this single request, that he would wait on the king and the duke of York with his hat under his arm, and that he would not "thee" and "thou" them. William answered that his conscience would not permit him to do these things. This exasperated his father to such a degree that he turned him out of doors. Young Penn gave God thanks that he permitted him to suffer so early in His cause, and went into the city, where he held forth, and made a great number of converts; and being young, handsome, and of a graceful figure, both court and city ladies flocked very devoutly to hear him. The patriarch Fox, hearing of his great reputation, came to London — notwithstanding the length of the journey — purposely to see and converse with him. They both agreed to go upon missions into foreign countries; and accordingly they embarked for Holland, after having left a sufficient number of laborers to take care of the London vineyard.

Black Elk Speaks (1961)
Context: Crazy Horse dreamed and went into the world where there is nothing but the spirits of all things. That is the real world that is behind this one, and everything we see here is something like a shadow from that one. He was on his horse in that world, and the horse and himself on it and the trees and the grass and the stones and everything were made of spirit, and nothing was hard, and everything seemed to float. His horse was standing still there, and yet it danced around like a horse made only of shadow, and that is how he got his name, which does not mean that his horse was crazy or wild, but that in his vision it danced around in that queer way.
It was this vision that gave him his great power, for when he went into a fight, he had only to think of that world to be in it again, so that he could go through anything and not be hurt. Until he was killed at the Soldiers' Town on White River, he was wounded only twice, once by accident and both times by some one of his own people when he was not expecting trouble and was not thinking; never by an enemy. He was fifteen years old when he was wounded by accident; and the other time was when he was a young man and another man was jealous of him because the man's wife liked Crazy Horse.
They used to say that he carried a sacred stone with him, like one he had seen in some vision, and that when he was in danger, the stone always got heavy and protected him somehow. That, they used to say, was the reason that no horse he ever rode lasted very long. I do not know about this; maybe people only thought it; but it is a fact that he never kept one horse long. They wore out. I think it was only the power of his great vision that made him great.

Forever Fiona http://www.elle.com/pop-culture/celebrities/forever-fiona-2, interview by Liza Ghorbani (June 7, 2012)

“I always admired Patton. Oh, sure, the stupid bastard was crazy.”
The Brass Ring (1971)
Context: If you're a leader, you don't push wet spaghetti, you pull it. The U. S. Army still has to learn that. The British understand it. Patton understood it. I always admired Patton. Oh, sure, the stupid bastard was crazy. He was insane. He thought he was living in the Dark Ages. Soldiers were peasants to him. I didn't like that attitude, but I certainly respected his theories and the techniques he used to get his men out of their foxholes.

“Human beings are chimpanzees who get crazy drunk on power.”
Cold Turkey (2004)
Context: Human beings are chimpanzees who get crazy drunk on power. By saying that our leaders are power-drunk chimpanzees, am I in danger of wrecking the morale of our soldiers fighting and dying in the Middle East? Their morale, like so many bodies, is already shot to pieces. They are being treated, as I never was, like toys a rich kid got for Christmas.

"Zendaya Reveals Why She Became a Vegetarian: It's 'Definitely Not Because I Love Vegetables'" https://people.com/food/zendaya-vegetarian-diet/, People (9 December 2016).

“There is something fucking unbelievable about seeing all of the fans go crazy and chanting 'Ozzy!”
I would pay to see them..
askmen.com, 2002

“I'm crazy enough to believe that the happiest man on earth is the man with the fewest needs.”
Source: The Colossus of Maroussi (1941) Part 2, p. 133

Don't Blame Me, written by Taylor Swift, Max Martin, and Shellback
Song lyrics, Reputaion (2017)

“Do something. If it doesn't work, do something else. No idea is too crazy.”

“You’re ten pints of crazy in a one-pint glass.”
Source: Red Seas Under Red Skies (2007), Chapter 8 “Summer’s End” section 5 (p. 396)

Source: No One Belongs Here More Than You
“It's a lot easier to be crazy or mad than to just get on with living.”
Source: The Year of Secret Assignments
Source: The Shadow of the Bear
Source: Girl, Interrupted
“Conform, go crazy, or become an artist.”

“If we weren't all crazy, we would go insane.”
Variant: If we couldn't laugh we would all go insane.

“I'll take crazy over stupid any day.”

“We're all crazy. What's your specific form of crazy?”
Source: Ten Things We Did
“You don't think I'm crazy?" I asked hesitantly.
"Like I'm one to judge another persons sanity.”
Source: Alice in Zombieland
“One of the secrets of a successful life is to know how to be a little profitably crazy.”
Source: To Love and Be Wise
Source: Postcards from Ed: Dispatches and Salvos from an American Iconoclast
Source: Magic Rises
“Perhaps I wasn't going crazy after all. Perhaps I was just becoming a writer.”
Source: Just One Wish