„The goys have proven the following theorem…“

„The idea that theorems follow from the postulates does not correspond to simple observation.“

—  Richard Hamming American mathematician and information theorist 1915 - 1998

The Unreasonable Effectiveness of Mathematics (1980)
Contexto: The idea that theorems follow from the postulates does not correspond to simple observation. If the Pythagorean theorem were found to not follow from the postulates, we would again search for a way to alter the postulates until it was true. Euclid's postulates came from the Pythagorean theorem, not the other way around.

„A mathematician, then, will be defined in what follows as someone who has published the proof of at least one non-trivial theorem.“

—  Jean Dieudonné

Mathematics and Mathematicians (1992); published in Is Mathematics Inevitable? A Miscellany (2008), edited by Underwood Dudley, p. 3. ISBN 0883855666

„If you ever forget you are a Jew a goy will remind you.“

—  Bernard Malamud American author 1914 - 1986

"Black is My Favorite Color", in Idiots First (1963), p. 29

„A mathematician is a machine for turning coffee into theorems.“

—  Paul Erdős Hungarian mathematician and freelancer 1913 - 1996

Widely attributed to Erdős, this actually originates with Alfréd Rényi, according to My Brain Is Open : The Mathematical Journeys of Paul Erdos (1998) by Bruce Schechter, p. 155
Misattributed
Variante: A mathematician is a device for turning coffee into theorems.

„Love is not to be proven or measured… It exists, and that is enough.“

—  Jorge Amado Brazilian writer 1912 - 2001

Fonte: Gabriela, Clavo y Canela

„are the familiar translations and rotations… made in proving the theorems of Euclid.“

—  Howard P. Robertson American mathematician and physicist 1903 - 1961

Geometry as a Branch of Physics (1949)

„Bell's theorem says that reality must be non-local.“

—  Nick Herbert American physicist 1936

Fonte: Quantum Reality - Beyond The New Physics, Chapter 12, Bell's Interconnectedness Theorem, p. 212
Contexto: Bell himself managed to devise such a proof which rejects all models of reality possessing the property of "locality". This proof has since become known as Bells theorem. It asserts that no local model of reality can underlie the quantum facts. Bell's theorem says that reality must be non-local.

„I have discovered a truly remarkable proof of this theorem which this margin is too small to contain.“

—  Pierre de Fermat French mathematician and lawyer 1601 - 1665

Note written on the margins of his copy of Claude-Gaspar Bachet's translation of the famous Arithmetica of Diophantus, this was taken as an indication of what became known as Fermat's last theorem, a correct proof for which would be found only 357 years later; as quoted in Number Theory in Science and Communication (1997) by Manfred Robert Schroeder
Original: (la) Cuius rei demonstrationem mirabilem sane detexi hanc marginis exiguitas non caperet.

„How many theorems in geometry which have seemed at first impracticable are in time successfully worked out!“

—  Archimedes, livro On Spirals

On Spirals (225 B.C.)

„All things of grace and beauty such that one holds them to one's heart have a common provenance in pain. Their birth in grief and ashes.“

—  Cormac McCarthy, livro A Estrada

Fonte: The Road

„Physicists have come to realize that mathematics, when used with sufficient care, is a proven pathway to truth.“

—  Brian Greene American physicist 1963

Fonte: The Fabric of the Cosmos: Space, Time, and the Texture of Reality

„I see myself as a traditionalist … I like traditional things. I like things of substance and value that have been proven.“

—  Jakob Dylan singer and songwriter 1969

Interview for Columbia Records (2010) http://www.columbia.co.uk/releases/1687/Jakob
Contexto: I see myself as a traditionalist … I like traditional things. I like things of substance and value that have been proven. Conceptually, as the songs started to come together, I followed that lead, which is the language I work in.

„All things are possible until they are proven impossible.“

—  Pearl S. Buck American writer 1892 - 1973

„It’s difficult to identify where he can still improve. He has already proven to have everything.“

—  Thiago Silva Brazilian footballer 1984

Franco Baresi, 2012 http://football-italia.net/19459/baresi-thiago-silva-my-heir
From former and current footballers

„I am persuaded that it [The Method of Mechanical Theorems] will be of no little service to mathematics; for I apprehend that some, either of my contemporaries or of my successors, will, by means of the method when once established, be able to discover other theorems in addition, which have not yet occurred to me.“

—  Archimedes, livro The Method of Mechanical Theorems

The Method of Mechanical Theorems

„We re-make nature by the act of discovery, in the poem or in the theorem. And the great poem and the deep theorem are new to every reader, and yet are his own experience, because he himself re-creates them.“

—  Jacob Bronowski Polish-born British mathematician 1908 - 1974

Part 1: "The Creative Mind", §9 ( p. 20 http://books.google.com/books?id=TeHXAAAAMAAJ&q=%22We+re-make+nature+by+the+act+of+discovery+in+the+poem+or+in+the+theorem+And+the+great+poem+and+the+deep+theorem+are+new+to+every+reader+and+yet+are+his+own+experience+because+he+himself+re-creates+them%22&pg=PA20#v=onepage)
Science and Human Values (1956, 1965)

„It doesn't matter how long it takes, if the end result is a good theorem.“

—  John Tate

[Steve Nadis, A History in Sum, https://books.google.com/books?id=4e29AAAAQBAJ&pg=PA207, 1 November 2013, Harvard University Press, 978-0-674-72655-0, 207]

„There are numerous theorems in economics that rely upon mathematically fallacious propositions.“

—  Steve Keen Australian economist 1953

Fonte: Debunking Economics - The Naked Emperor Of The Social Sciences (2001), Chapter 12, Don't Shoot Me, I'm Only The Piano, p. 259

„A theorem is a proposition which is a strict logical consequence of certain definitions and other propositions“

—  Anatol Rapoport Russian-born American mathematical psychologist 1911 - 2007

Anatol Rapoport. " Various meanings of “theory”." http://www.acsu.buffalo.edu/~fczagare/PSC%20504/Rapoport%20(1958).pdf American Political Science Review 52.04 (1958): 972-988.
1950s