“Science’s success did not need a God to explain it; the world was enough.”

Newtonian Studies (1965).
Context: There is something for which Newton — or better to say not Newton alone, but modern science in general — can still be made responsible: it is splitting of our world in two. I have been saying that modern science broke down the barriers that separated the heavens and the earth, and that it united and unified the universe. And that is true. But, as I have said, too, it did this by substituting for our world of quality and sense perception, the world in which we live, and love, and die, another world — the world of quantity, or reified geometry, a world in which, though there is place for everything, there is no place for man. Thus the world of science — the real world — became estranged and utterly divorced from the world of life, which science has been unable to explain — not even to explain away by calling it "subjective".
True, these worlds are everyday — and even more and more — connected by praxis. Yet for theory they are divided by an abyss.
Two worlds: this means two truths. Or no truth at all.
This is the tragedy of the modern mind which "solved the riddle of the universe," but only to replace it by another riddle: the riddle of itself.

Succeeding in Science: Some Rules of Thumb (1993)
Context: To have success in science, you need some luck.
But to succeed in science, you need a lot more than luck. And it's not enough to be smart — lots of people are very bright and get nowhere in life. In my view, you have to combine intelligence with a willingness not to follow conventions when they block your path forward.

Foreword to the book A=B http://www.cis.upenn.edu/~wilf/AeqB.html (1996)
Source: Things a Computer Scientist Rarely Talks About

"With Science on Our Side" https://www.washingtonpost.com/archive/entertainment/books/1994/01/09/with-science-on-our-side/9e5d2141-9d53-4b4b-aa0f-7a6a0faff845/, Washington Post (January 9, 1994)
Variant: Not explaining science seems to me perverse. When you're in love, you want to tell the world.
Source: The Demon-Haunted World: Science as a Candle in the Dark

Friedrich Engels, in his The Dialectics of Nature
A - F

As quoted in Atatürkçülük, Volume I, General Staff of the Republic of Turkey, Millî Eğitim Basımevi, 1984, p. 283

Source: The Bed of Procrustes: Philosophical and Practical Aphorisms (2010), p. 4

Source: Dracula

This quote is actually credited to an American pastor of Swiss origin Frank Buchman, founder of the Moral Rearmament movement. Misquotes that Bapu is forced to wear http://articles.timesofindia.indiatimes.com/2011-10-03/ahmedabad/30238203_1_bapu-tushar-gandhi-gandhiji.
Misattributed