“Only sneaky people and impostors can oppose the progress of sciences and can discredit them, because they are the only ones who are harmed by the sciences.”

Part III : Selection on Education from Kant's other Writings, Ch. I Pedagogical Fragments, # 60
The Educational Theory of Immanuel Kant (1904)

When asked how students could aim to emulate him.
Appreciate science for what it is: Venkatraman Ramakrishnan

Interview with Max Delbruck (1978), p. 87. Oral History Project, California Institute of Technology Archives, Pasadena, California.

"Why We Remain Jews" (1962)
Context: Science, as the positivist understands it, is susceptible of infinite progress. That you learn in every elementary school today, I believe. Every result of science is provisional and subject to future revision, and this will never change. In other words, fifty thousand years from now there will still be results entirely different from those now, but still subject to revision. Science is susceptible of infinite progress. But how can science be susceptible of infinite progress if its object does not have an inner infinity? The belief admitted by all believers in science today — that science is by its nature essentially progressive, and eternally progressive — implies, without saying it, that being is mysterious. And here is the point where the two lines I have tried to trace do not meet exactly, but where they come within hailing distance. And, I believe, to expect more in a general way, of people in general, would be unreasonable.

"Science and Dictatorship," in Dictatorship on Its Trial, by Eminent Leaders of Modern Thought (1930) - later as Dictatorship on Trial (1931), Otto Forst de Battaglia (1889-1965), ed., Huntley Paterson, trans., introduction by Winston Churchill, George G. Harrap & Co., (Reprinted 1977, Beaufort Books Inc., p. 107. https://books.google.com/books?id=IjsiAAAAMAAJ&dq=9780836916072&focus=searchwithinvolume&q=%22only+in+an+atmosphere+of+free+speech%22 https://books.google.com/books?id=alq9M3_8qIcC&dq=9780836916072&hl=en&sa=X&ved=0ahUKEwj9w8nJkYfKAhUL12MKHf5uCscQ6AEIHDAA http://babel.hathitrust.org/cgi/pt/search?q1=%22Science%20can%20flourish%20only%20in%20an%20atmosphere%20of%20free%20speech%22;id=uc1.%24b47955;view=1up;seq=9;start=1;sz=10;page=search;orient=0 http://catalog.hathitrust.org/Record/000590821
1930s
Context: A dictatorship means muzzles all round and consequently stultification. Science can flourish only in an atmosphere of free speech.

Though sometimes quoted as if he were author of it, the expression "Only those who see the invisible can do the impossible" is one that greatly predates Lown's use of it; it has also been attributed to Thomas Jefferson, Jesus and Mrs. Charles E. Cowman, but the earliest published expression yet located seems to have been one by American Baptist minister Rev. Robert Stuart MacArthur in Royal Messages of Cheer and Comfort Beautifully Told (1909) edited by Sarah Conger Robinson, p. 58
A Prescription for Hope (1985)
Context: We must hold fast to the dream that reason will prevail. The world today is full of anguish and dread. As great as is the danger, still greater is the opportunity. If science and technology have catapulted us to the brink of extinction, the same ingenuity has brought humankind to the boundary of an age of abundance.
Never before was it possible to feed all the hungry. Never before was it possible to shelter all the homeless. Never before was it possible to teach all the illiterates. Never before were we able to heal so many afflictions. For the first time science and medicine can diminish drudgery and pain.
Only those who see the invisible can do the impossible. But in order to do the impossible, in the words of Jonathan Schell, we ask "not for our personal survival: we ask only that we be survived. We ask for assurance that when we die as individuals, as we know we must, mankind will live on".

As quoted in [McInerney, Daniel John, The Fortunate Heirs of Freedom: Abolition & Republican Thought, https://books.google.com/books?id=ZrnV5Rj6eckC, 1994, U of Nebraska Press, 0-8032-3172-5, 83-4]

Source: What Is This Thing Called Science? (Third Edition; 1999), Chapter 5, Introducing falsification, p. 60.