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Beautiful Quotes:

"Motivation gets you going but Discipline keeps you growing " John C. Maxwell 

"Don’t just read it; fight it. Ask your own questions, look for your own examples, discover your own proofs." Paul Halmos 

“Climate is simpler to control than to predict.”  By Petr Dvoretsky 

"Those that fail to learn from history are doomed to repeat it."

"Les mathématiques sont un moyen de penser, pas une collection de théorèmes" Israël Moiseevich Gelfand

« Le hasard est comme le soleil, il aveugle à mesure qu’on le fixe. » (Emile Borel)

"Education is not the filling of a pail, but the lighting of a fire."

"Une mer calme n'a jamais fait un bon marin. Ce n'est que dans la tempête qu'un bon capitaine se forme."

"Un imbécile qui marche va bien plus loin que six intellectuels assis", proverbe chinois.

"Un jour, à force de fouiller l’atome,

un savant expliquera peut-être

la joie et la paix de l’esprit

par des formules mathématiques." Bernard Moitessier

"The mediocre teacher tells. The good teacher explains. The superior teacher

demonstrates. The great teacher inspires." (William Arthur Ward)

“The only way to learn mathematics is to do mathematics.” - Paul Halmos

"... One has to see the time flowing, 

One needs to feel one's heart bleeding,

And not just once.

Before that thought would shine at last,

Reborn from old mist that passed." The Russian poet Maikov

"…We’re riddled with pointless talk, insane quantities of words and images. Stupidity’s never blind or mute. So it’s not a problem of getting people to express themselves but of providing little gaps of solitude and silence in which they might eventually find something to say. Repressive forces don’t stop people expressing themselves but rather force them to express themselves; what a relief to have nothing to say, the right to say nothing, because only then is there a chance of framing the rare, and ever rarer, thing that might be worth saying." From Gilles Deleuze in Negotiations, 1985.

"One must learn by doing the thing; for though you think you know it, you have no certainty until you try". Sophocles

"Although we often hear that data speak for themselves, their voices can be soft and sly." (Charles) Frederick Mosteller, 1983  

‘What we have to learn to do, we learn by doing.’ Aristotle 

"« Les tyrans ne sont grands que parce que nous sommes à genoux. » Étienne de La Boétie "

"Mathematics is the part of physics where the experiments are cheap."

"Mathematics is the part of philosophy where (some) statements are true — without debate or discussion."

"Mathematics is computer science without electricity.” (So “Computer science is mathematics with electricity.”)

"I think of data scientists as knowing more about statistics than computer scientists and more about computer science than statisticians.", Michael O'Connell (KDnuggets Interview - May, 2014)."

"The great watershed in optimization isn't between linearity and nonlinearity, but convexity and nonconvexity." -- R. Tyrrell Rockafellar, in SIAM Review, 1993

"No one trusts a model except the man who wrote it; everyone trusts an observation, except the man who made it". Harlow Shapley 

« Les grands ne sont grands que parce que nous sommes à genoux : levons-nous ! », Pierre Victurnien VERGNIAUD (1753-1793) et Élisée (de) LOUSTALOT (1762-1790), devise en tête du journal de Louis-Marie Prudhomme, Les Révolutions de Paris.

"You can never know everything, Lan said quietly, and part of what you know is always wrong. Perhaps even the most important part. A portion of wisdom lies in knowing that. A portion of courage lies in going on anyway." Robert Jordan, Winter’s Heart. 

"Les maths sont ce qu'il y a de plus facile à comprendre. Sauf pathologie mentale profonde, tout le monde est bon en maths. Mais pour des raisons que les psychologues pourraient sans doute élucider, certains jeunes décident qu'ils ne sont pas bons. Je crois que la principale responsabilité réside dans la façon dont les mathématiques sont enseignées." A. Jacquard

« La phrase la plus excitante en sciences n’est pas « Euréka, j’ai trouvé ! » mais : « Tiens, c’est étrange... » Isaac Asimov

Il convient de « toujours montrer la relativité d'une connaissance, sa dépendance par rapport à l'observateur et aux conditions d'observation, sans oublier qu'un grain de connaissance sur un plan peut se payer par une ignorance sur un autre. » Edgar Morin

« Apprendre ce n’est pas seulement augmenter son stock de savoirs, c’est aussi et peut-être même d’abord, transformer ses façons de penser le monde. » Jean-Pierre ASTOLFI

“Learning is acquired by reading books, but the much more necessary learning, the knowledge of the world, is only to be acquired by reading men, and studying all the various editions of them.” — Lord Chesterfield, “Letters to His Son”

"Comme chercheur, je me suis senti jardinier plus qu’architecte. J’ai donc contribué à découvrir ou à créer des espèces Nouvelles […] On sait bien qu’il n’y a pas de plaisir sans douleur, et j’ai beaucoup peiné, comme tout le monde sans doute, en m’égarant, en me trompant, en rectifiant, en recommençant, avant d’aboutir aux résultats qui m’ont procuré le plus de plaisir." Jean-Pierre Kahane

“It is all that introduces order,

all that gives unity, that permits us

to see clearly and to comprehend

at once both the ensemble and the details.”

Henri Poincaré

“And learning, for Musk, is simply the process of “downloading data and algorithms into your brain.” Among his many frustrations with formal classroom learning is the “ridiculously slow download speed” of sitting in a classroom while a teacher explains something, and to this day, most of what he knows he’s learned through reading.”

― Tim Urban, The Elon Musk Blog Series: Wait But Why

"In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion". 

(1987) -- Carl Sagan 

"Les enfants n'ont pas d'idées, ils font des idées", anonyme.

« Je n’ai jamais cru en une vérité unique, ni en la mienne, ni en celle des autres.

Je crois que toutes les écoles de pensée, toutes les théories peuvent être utiles à un moment donné, dans une circonstance particulière. Mais j’ai découvert qu’on ne peut vivre qu’à condition de s’identifier passionnément et totalement à son propre point de vue.

Cependant, au fur et à mesure que le temps passe, que nous changeons, que le monde change, nos buts se modifient et le point de vue change lui aussi.

Lorsque je regarde en arrière et que je considère les essais que j’ai écrits au fil du temps, les idées dont j’ai débattues en maints endroits et à maintes reprises, je suis frappé par la permanence d’une chose : pour qu’un point de vue soit d’une quelconque utilité, il faut s’y engager totalement et le défendre jusqu’à la mort. Et cependant, en même temps, une voix intérieure murmure : ne prends pas cela trop au sérieux. Maintiens fermement, laisse aller en douceur. »

Peter Brook, The Shifting Point

C.N. Yang: "Physics is not mathematics, just as mathematics is not physics. Somehow nature chooses only a subset of the very beautiful and complex and intricate mathematics that mathematicians develop, and that precise subset is what the theoretical physicist is trying to look for."

"The most powerful method of advance [in physics] ... is to employ all the resources of pure mathematics in attempts to perfect and generalize the mathematical formalism that forms the existing basis of theoretical physics, and ... to try to interpret the new mathematical features in terms of physical entities."---Paul Dirac

"The quiet statisticians have changed our world; not by discovering new facts or technical developments, but by changing the ways that we reason, experiment and form our opinions ...."–Ian Hacking

"There is no true interpretation of anything; interpretation is a vehicle in the service of human comprehension. The value of interpretation is in enabling others to fruitfully think about an idea."–Andreas Buja

"Statisticians, like artists, have the bad habit of falling in love with their models"---George E Box

"Statistical thinking will one day be as necessary for efficient citizenship as the ability to read and write !"---H. G. Wells 

“A person’s name is to that person, the sweetest, most important sound in any language.”

--Dale Carnegie

"I think it’s very important to have a feedback loop, where you’re

constantly thinking about what you’ve done and how you could

be doing it better."---Elon Musk

"The philosophy of the school room in one generation will be the philosophy of government in the next."―Abraham Lincoln

“and when nobody wakes you up in the morning, and when nobody waits for you at night, and when you can do whatever you want. what do you call it, freedom or loneliness?”

― Charles Bukowski 

"In our country,

when the funds have to be cut,

the funds for culture and research are cut,

as usual,

since they are evidently considered

an unnecessary luxury."--Margherita Hack (1922-2013)

“Look again at that dot. That's here. That's home. That's us. On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives. The aggregate of our joy and suffering, thousands of confident religions, ideologies, and economic doctrines, every hunter and forager, every hero and coward, every creator and destroyer of civilization, every king and peasant, every young couple in love, every mother and father, hopeful child, inventor and explorer, every teacher of morals, every corrupt politician, every "superstar," every "supreme leader," every saint and sinner in the history of our species lived there – on a mote of dust suspended in a sunbeam...”, Carl Sagan, Pale Blue Dot (1994)

"J’ai profondément regretté de ne pas avoir été assez loin pour au moins comprendre un petit peu des grands principes fondamentaux des mathématiques : car les hommes qui les ont acquis semblent avoir un sens supplémentaire – un sixième sens."-- Charles Darwin

“Appear weak when you are strong, and strong when you are weak.” – Sun Tzu 

"If we wish to foresee the future of mathematics our proper course is to study the history and present condition of the science." Henri Poincaré 

"Learn everything, and you will see afterward that nothing is useless" Unknown.

"Science is organised knowledge. Wisdom is organised life." Emmanuel Kant

"ينبغي لنا ان لا نستحي من استحسان الحق واقتناء الحق من اين اتى وان اتى من الاجناس القاصية عنا والامم المباينة لنا.

أبو يوسف يعقوب بن اسحاق الكندي"

"Pure mathematics is, in its way, the poetry of logical ideas". Albert Einstein

“On apprend toujours seul, mais jamais sans les autres !” Philippe Carré

"Ceux qui prétendent détenir la vérité sont ceux qui ont abandonné la poursuite du chemin vers elle. La vérité ne se possède pas, elle se cherche." Albert JACQUARD

La philosophie c'est : penser sa vie et vivre sa pensée, 'Anonyme'

"I am sorry I have had to write you such a long letter, but I did not have time to write you a short one." --Blaise Pascal

"It usually takes me more than three weeks to prepare a good impromptu speech." --Mark Twain

"Don't just steal the style, steal the thinking behind the style. You don't want to look loke heroes, you want to see like heroes." Austin Kleon, Steal Like an Artist.

"Je crois que tout est toujours en question, tout est toujours à sauver, que rien n’est définitivement acquis, et qu’il n’y aura jamais de repos sur la Terre pour les Hommes de bonne volonté. "  Raymond Aron

"When you make a failure, it is because you have not asked for enough; keep on, and a larger thing then you were seeking will certainly come to you, Remember this." The science of getting rich.

"Au pays des aveugles les borgnes sont rois", Proverbe.

"God helps those who help themselves (aide toi, le ciel t’aidera)"

"Learn everything, and you will see afterward that nothing is useless", Hugo of Saint Victor

"Lorsque les hommes travaillent ensemble, les montagnes se changent en or." Proverbe chinois

"If you don’t have any shadows, you’re not standing in the light."

"Intelligece is the ability to adapt to change" Unknown

"Politics is for the present, but an equation is something for eternity."  (Albert Einstein)

"The real understanding involves, I believe, a synthesis of the discrete and continuous ..."

L. Lovasz, Discrete and Continuous: two sides of the same?

"When I use a word," Humpty Dumpty said, in rather a scornful tone, "it means just what I choose it to mean—neither more nor less."  Humpty Dumpty

«Human error is the price we pay for intelligence»

"The faintest writing is better than the best memory", Chinese quote.

“There is a deep division (or at least so it appears) between Continuous and

Discrete Mathematics. [...] how much we could lose if we let this chasm grow

wider, and how much we can gain by building bridges over it.”

(Laszlo Lovasz, One Mathematics, [Lov99].)

“The mediocre teacher tells. The good teacher explains. The superior teacher

demonstrates. The great teacher inspires.”

(William Arthur Ward)

"Ce que j'aime dans les mathématiques appliquées, c'est qu'elles ont pour ambition de donner du monde des systèmes une représentation qui permette de comprendre et d'agir. Et, de toutes les représentations, la représentation mathématique, lorsqu'elle est possible, est celle qui est la plus souple et la meilleure." Jacques-Louis Lions

"Mieux vaut allumer une chandelle que de maudire l'obscurité" proverbe chinois

“La connaissance de l’homme ne saurait s’étendre au-delà de sa propre expérience” 

John Locke 

"As we express our gratitude, we must never forget that the highest appreciation is not to utter words, but to live by them."

John F. Kennedy