“Infinite product spaces are the natural habitat of probability theory.”
Source: An Introduction To Probability Theory And Its Applications (Third Edition), Chapter V, Conditional Probability, Stochastic Independence, p. 130
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William Feller 30
Croatian-American mathematician 1906–1970Related quotes

The Relation between Mathematics and Physics http://www.damtp.cam.ac.uk/events/strings02/dirac/speach.html (Feb. 6, 1939) Proceedings of the Royal Society (Edinburgh) Vol. 59, 1938-39, Part II, pp. 122-129.

Part IV: Personal and Philosophical Essays, Ch. 24 : "The World, the Flesh, and the Devil" (1972)
The Scientist As Rebel (2006)
Context: I have to clear away a few popular misconceptions about space as a habitat … It is generally considered that planets are important. Except for Earth, they are not. Mars is waterless, and the others are, for various reasons, basically inhospitable to man. It is generally considered that beyond the sun’s family of planets there is absolute emptiness extending for light-years until you come to another star. In fact, it is likely that the space around the solar system is populated by huge numbers of comets, small worlds a few miles in diameter, rich in water and the other chemicals essential to life.

Source: https://www.youtube.com/watch?v=Ifi5KkXig3s "Biblical Series IV: Adam and Eve: Self-Consciousness, Evil, and Death"

“The eternal silence of these infinite spaces alarms me.”
"The Misery of Man Without God": "Man's Disproportion," The Thoughts of Blaise Pascal translated from the Text of M. Auguste Molinier https://books.google.com/books?id=LbkIAAAAQAAJ Tr. C. Kegan Paul (1885)
Source: Pensées
Context: When I consider the short duration of my life, swallowed up in the eternity before and after, the small space which I fill, or even can see, engulfed in the infinite immensity of spaces whereof I know nothing, and which know nothing of me, I am terrified, and wonder that I am here rather than there, for there is no reason why here rather than there, or now rather than then. Who has set me here? By whose order and design have this place and time been destined for me?—Memoria hospitis unius diei prætereuntis.
It is not well to be too much at liberty. It is not well to have all we want.
How many kingdoms know nothing of us!
The eternal silence of these infinite spaces alarms me.

Source: The Urban Question: A Marxist Approach, 1977, p. 124 as quoted in: Phil Hubbard, Rob Kitchin (2010) Key Thinkers on Space and Place. p. 101