"If error is corrected whenever it is recognized as such, the path of error is the path of truth." Hans Reichenbach, born 26 September 1891.
"If you want to move mountains, you just go move mountains. If you don't have a big enough shovel, you get some friends to help you. If you have the enthusiasm to charge ahead, you can do all sorts of things. Some things you can't do. You can't invent a perpetual motion machine. You've got to select your targets. But people can do so much more than they realize." Paul MacCready, born 25 September 1925.
"The greatest advantage in gambling lies in not playing at all." Gerolamo Cardano, born 24 September 1501.
"There were a significant number of questions I had asked myself and, as you know, when you really ask yourself the questions, you give better answers than if we merely read the conventional answers." Albert Messiah, born 23 September 1921.
"Nature is our kindest friend and best critic in experimental science if we only allow her intimations to fall unbiassed on our minds. Nothing is so good as an experiment which whilst it sets an error right gives us a reward for our humility in being refreshed by an absolute advancement in knowledge." Michael Faraday, born 22 September 1791.
"Physics is a wrong tool to describe living systems." Donald Glaser, born 21 September 1926.
"All scientists must communicate their work, for what is the point of learning new things about how the world works if you don't tell anyone about them?" Jim Al-Khalili, born 20 September 1962.
"... conferences with open attendance are very important for the stimulation of young people or other people who are new in the field." Victor Weisskopf, born 19 September 1908.
"Above all, we must be accurate, and it is an obligation which we intend to fulfil scrupulously." Léon Foucault, born 18 September 1819.
"The Earth is the cradle of mind, but one cannot live in a cradle forever." Konstantin Tsiolkovsky, born 17 September 1857.
"Thus the questions (and the quest) go on." George Sudarshan, born 16 September 1931.
"While many questions about quantum mechanics are still not fully resolved, there is no point in introducing needless mystification where in fact no problem exists. Yet a great deal of recent writing about quantum mechanics has done just that." Murray Gell-Mann, born 15 September 1929.
"Our imagination is struck only by what is great; but the lover of natural philosophy should reflect equally on little things." Alexander von Humboldt, born 14 September 1769.
"Science knows no boundaries, and efforts to create barriers – whether to keep new ideas within or to prevent new ones from entering from the outside – have universally proved harmful to progress." Sidney Drell, born 13 September 1926.
"Most probably some law hitherto undiscovered exists." Arthur Schuster, born 12 September 1851.
"There are no surprising facts, only models that are surprised by facts; and if a model is surprised by the facts, it is no credit to that model." Eliezer Yudkowsky, born 11 September 1979.
"The benefits of science are not only material ones. The truths that science teaches are of common interest the world over. The language of science is universal, and is a powerful force in bringing the peoples of the world closer together." Arthur Compton, born 10 September 1892.
"To see worlds in an electron." Hans Dehmelt, born 9 September 1922.
"Those who always take the same paths, usually see the same objects; it is rare that upon following different routes, one won't discover new topics worthy of our most serious attention. Similarly, various attempts give us a greater amount of knowledge. By trying different keys, we can hope to finally find some that open secure paths, short and easy, leading to the wealth of physics." Pierre Polinière, born 8 September 1671.
"Scientific collaborations are akin to marriages, or temporary marriages. Their breakup is not unlike a divorce and rarely avoids acrimony." Peter Freund, born 7 September 1936.
"No longer was light analogous to the discharge of a blunderbuss, but rather to the pulsating flight of birds." Banesh Hoffmann, born 6 September 1906.
"So long as you live and in whatever circumstances the kaleidoscope of life may place you, think for yourself and act in accordance with the conclusions of that thinking; avoid so far as possible drifting with the current of the mob or being too easily influenced by the outward manifestation of things. Take your own look beneath the surface and don't trust others to look for you. If you will follow this rule consistently, I am sure you will keep out of much trouble, will make the most out of your life and, what is more, will contribute most of value to the community life." Frank B. Jewett, born 5 September 1879.
"The progress of science is tremendously disorderly, and the motivations that lead to this progress are tremendously varied, and the reasons why scientists go into science, the personal motivations, are tremendously varied. I have said ... that science is a haven for freaks, that people go into science because they are misfits, and that it is a sheltered place where they can spin their own yarn and have recognition, be tolerated and happy, and have approval for it." Max Delbrück, born 4 September 1906.
"The atom can't be seen, yet its existence can be proved. And it is simple to prove that it can't ever be seen. It has to be studied by indirect evidence – and the technical difficulty has been compared to asking a man who has never seen a piano to describe a piano from the sound it would make falling downstairs in the dark." Carl Anderson, born 3 September 1905.
"Chemistry has been termed by the physicist as the messy part of physics, but that is no reason why the physicists should be permitted to make a mess of chemistry when they invade it. " Frederick Soddy, born 2 September 1877.
"I see a tremendous amount of intricacy in the world and we have probably only begun to scratch at the surface of its intricacy." Roy Glauber, born 1 September 1925.
"... science is the most revolutionary force in the world." George Sarton, born 31 August 1884.
"To see the world for a moment as something rich and strange is the private reward of many a discovery." Edward Mills Purcell, born 30 August 1912.