you don't see electrons, gravity, or black holes either
Source: Wonderful Life (1989), p. 279
“There is a fundamental difference between religion, which is based on authority and science, which is based on observation and reason. Science will win, because it works.”
Interview with Diane Sawyer, as quoted in "Stephen Hawking on Religion: 'Science Will Win'" on ABC World News (7 June 2010) http://abcnews.go.com/WN/Technology/stephen-hawking-religion-science-win/story?id=10830164
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Stephen Hawking 122
British theoretical physicist, cosmologist, and author 1942–2018Related quotes

Source: Words of a Sage : Selected thoughts of African Spir (1937), p. 39.

“Our youth education is based on three pillars: belief, science and work.”
https://www.kff.com/king-faisal-bin-abdulaziz/

1880s, "The Study of Administration," 1887

“Cosmology is a science which has only a few observable facts to work with.”
Conclusion of his Nobel lecture http://nobelprize.org/nobel_prizes/physics/laureates/1978/wilson-lecture.html (December 8, 1978) emphasizing that every new experimental discovery increases significantly our knowledge.
Oscar Iden Lecture Series, Lecture 3: "The State of Individuals" (1976)