“Ecology is the science of everything. Nobody knows everything. Nobody even knows everything about any one thing. And most of us don't know much. Say it's ten-thirty on a Saturday night. Where are your teenage children? I didn't ask where they said they were going. Where are they really? What are they doing? Who are they with? Have you met the other kids' families? And what is tonight's pot smoking, wine-cooler drinking, and sex in the backseats of cars going to mean in a hundred years? Now extend these questions to the entire solar system.”
All the Trouble in the World (1994)
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P. J. O'Rourke 185
American journalist 1947Related quotes

Source: The Power of Myth (book), p. 120
Context: Moyers: Do you ever have the sense of... being helped by hidden hands?
Campbell: All the time. It is miraculous. I even have a superstition that has grown on me as a result of invisible hands coming all the time — namely, that if you do follow your bliss you put yourself on a kind of track that has been there all the while, waiting for you, and the life that you ought to be living is the one you are living. When you can see that, you begin to meet people who are in your field of bliss, and they open doors to you. I say, follow your bliss and don't be afraid, and doors will open where you didn't know they were going to be.

“If you don't know everything, you must go on with what you do know.”
Rand al'Thor
Source: A Crown of Swords (15 May 1996)

Nerdist podcast, episode #25 http://www.nerdist.com/2010/07/nerdist-podcast-25-maria-bamford/, July 5, 2012
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The first two sentences of this statement first appear as attributed to France in the 1990s, but the full statement is earlier attributed to William Feather, as quoted in Telephony, Vol. 150 (1956), p. 23 http://books.google.com/books?id=Wm0jAQAAMAAJ&q=%22being+able+to+differentiate+between+what+you+do+know%22&dq=%22being+able+to+differentiate+between+what+you+do+know%22&hl=en&sa=X&ei=qYJOU9dAzoXRAYumgcAP&ved=0CMsCEOgBMDQ
Misattributed
As quoted in Telephony, Vol. 150 (1956), p. 23 http://books.google.com/books?id=Wm0jAQAAMAAJ&q=%22being+able+to+differentiate+between+what+you+do+know%22&dq=%22being+able+to+differentiate+between+what+you+do+know%22&hl=en&sa=X&ei=qYJOU9dAzoXRAYumgcAP&ved=0CMsCEOgBMDQ; the first two sentences of this statement began to be attributed to Anatole France in the 1990s, but without any citations of sources.