„The square root of I is I.“

—  Vladimir Nabokov, livro Bend Sinister

Fonte: Bend Sinister

1899 - 1977

„Irrationality is the square root of all evil.“

—  Douglas Hofstadter American professor of cognitive science 1945

"Irrationality is the Square Root of All Evil" (Sep, 1983) Scientific American 249 (3) article reprinted in Metamagical Themas (1985)

„The intelligence of that creature known as a crowd is the square root of the number of people in it.“

—  Terry Pratchett, livro Jingo

Fonte: Jingo

„There was a young fellow from Trinity,Who took the square root of infinity.“

—  George Gamow Russian-American physicist and science writer 1904 - 1968

One, Two, Three... Infinity (1947)
Contexto: There was a young fellow from Trinity,
Who took the square root of infinity.
But the number of digits, Gave him the fidgets;
He dropped Math and took up Divinity.

„I comma square bracket recruit's name square bracket comma…“

—  Terry Pratchett, livro Men at Arms

Men at Arms

„The Hindus introduced negative numbers… The first known use is Brahmagupta about 628; he also states the rules for the four operations with negative numbers. Bhāskara points out that the square root of a positive number is twofold, positive and negative. He brings up the matter of the square root of a negative number but says that there is no square root because a negative number is not a square. No definitions, axioms, or theorems are given.The Hindus did not unreservedly accept negative numbers. Even Bhāskara, while giving 50 and -5 as two solutions of a problem, says, "The second value is in this case not to be taken, for it is inadequate; people do not approve of negative solutions."“

—  Morris Kline American mathematician 1908 - 1992

However, negative numbers gained acceptance slowly.
p. 185.
Mathematical Thought from Ancient to Modern Times (1972)

„I fought Hughes the first time, he beat me fair and square- fairly squarely, sorry.“

—  Georges St. Pierre Canadian mixed martial artist 1981

After fight with Sean Sherk at UFC 56, pleading for a rematch with Hughes.
MMA

„When I cover the square surface with rectangles, it lightens the weight of the square. Destroys its power.“

—  Agnes Martin American artist 1912 - 2004

as quoted by Lucy R. Lippard, in 'Hommage to the Square', Art in America, July-August 1967, p. 55
This quote is one of the most frequently quoted statements of Agnes Martin. A later variation by her: 'The rectangle is pleasant, whereas the square is not'; Agnes Martin is than 89 - quoted in A House Divided: American Art Since 1955, Anne M. G. Wagner Univ. of California Press 2012, p. 263
1960's

„Square one, here I come. - Sam“

—  Rick Riordan American writer 1964

For Magnus Chase: Hotel Valhalla, Guide to the Norse Worlds

„I am rooted, but I flow.“

—  Virginia Woolf English writer 1882 - 1941

„I always root for the monster.“

—  Jessica Bird, livro Dark Lover

Fonte: Dark Lover

„There is nothing to square. I support Mr. Trump and his policies 100 percent.“

—  Katrina Pierson Political spokesperson 1976

In an email to The Huffington Post. http://www.huffingtonpost.com/entry/donald-trump-katrina-pierson-lgbt_us_57a214dae4b0104052a09c00 (August 3, 2016)

„But then I have always been somewhat of a square peg in a round hole.“

—  Cressida Cowell, livro How to Speak Dragonese

Fonte: How to Speak Dragonese

„I can remember what I ate. Coconut squares dipped in chocolate, wrapped in gold paper.“

—  Fenella Fielding English actress 1927 - 2018

Her recollections of her father's cinema
Interview: Independent, Sunday 24 February 2008 http://www.independent.co.uk/arts-entertainment/films/features/the-lady-vanishes-what-ever-happened-to-fenella-fielding-785265.html

„Last night I walked clear down to Times Square & just as I arrived I suddenly realized I was a ghost - it was my ghost walking on the sidewalk.“

—  Jack Kerouac, livro On the Road

„I taught myself decimals, equations, the square, cube, and biquadrate roots. I got some knowledge of logarithms, and some of algebra. I readily got through a small schoolbook of geometry; and having an odd volume, the first, of Williamson's ' Euclid,' I attacked it vigorously and perseveringly. Williamson's is by no means the best book on the subject, yet I am still of opinion that it is the best book I could have had for the purpose of teaching myself.“

—  Francis Place English social reformer 1771 - 1854

p. 18

„I bit down three nails rooting for the Heat.“

—  Gloria Estefan Cuban-American singer-songwriter, actress and divorciada 1957

comment at Zo's Summer Groove benefit concert in aftermath of Miami Heat winning basketball championship (Miami, July 16, 2006)
2007, 2008

„In love with whole numbers, the Pythagoreans believed that all things could be derived from them. Certainly all other numbers.So a crisis in doctrine occurred when they discovered that the square root of two was irrational.“

—  Carl Sagan American astrophysicist, cosmologist, author and science educator 1934 - 1996

37 min 45 sec
Cosmos: A Personal Voyage (1990 Update), The Backbone of Night [Episode 7]
Contexto: There can be an infinite number of polygons, but only five regular solids. Four of the solids were associated with earth, fire, air and water. The cube for example represented earth. These four elements, they thought, make up terrestrial matter. So the fifth solid they mystically associated with the Cosmos. Perhaps it was the substance of the heavens. This fifth solid was called the dodecahedron. Its faces are pentagons, twelve of them. Knowledge of the dodecahedron was considered too dangerous for the public. Ordinary people were to be kept ignorant of the dodecahedron. In love with whole numbers, the Pythagoreans believed that all things could be derived from them. Certainly all other numbers.
So a crisis in doctrine occurred when they discovered that the square root of two was irrational. That is: the square root of two could not be represented as the ratio of two whole numbers, no matter how big they were. "Irrational" originally meant only that. That you can't express a number as a ratio. But for the Pythagoreans it came to mean something else, something threatening, a hint that their world view might not make sense, the other meaning of "irrational".

„The little rectangle contradicts the square. And the square is authoritative... The rectangle is pleasant, whereas the square is not.... It's too stiff, too authoritative. My paintings are made up of little rectangles, not little squares There was a scholar who dug up a Tantric drawing that was just like my grid, and it was made of rectangles, too, just exactly like mine... I was surprised. I didn't think anybody had made a grid quite like that.“

—  Agnes Martin American artist 1912 - 2004

1980 - 2000, Perfection Is in the Mind', 1995

„It's my job not always to put square pegs in square holes but sometimes to put the odd square peg in a round hole.“

—  Phil Brown (footballer) English association football player and manager 1959

7-Jan-2006, DCFC website
You're just going to have to work that one out for yourself.

„I stand for the square deal. But when I say that I am for the square deal, I mean not merely that I stand for fair play under the present rules of the game, but that I stand for having those rules changed so as to work for a more substantial equality of opportunity and of reward for equally good service. One word of warning, which, I think, is hardly necessary in Kansas. When I say I want a square deal for the poor man, I do not mean that I want a square deal for the man who remains poor because he has not got the energy to work for himself. If a man who has had a chance will not make good, then he has got to quit. And you men of the Grand Army, you want justice for the brave man who fought, and punishment for the coward who shirked his work. Is that not so?“

—  Theodore Roosevelt American politician, 26th president of the United States 1858 - 1919

1910s, The New Nationalism (1910)