“You don't have to know the future and all the marvelous details of endtime prophecy. These events will happen whether you know them or not. But it's a good thing to know and to understand these things so that you'll be able to know what's going on and what's happening, as well as be able to teach and warn others.”

The Circle, p. 21
Catching the Big Fish (2006)
Context: I like the saying "The world is as you are." And I think films are as you are. That's why, although the frames of a film are always the same — the same number, in the same sequence, with the same sounds — every screening is different. The difference is sometimes subtle but it's there. It depends on the audience. There is a circle that goes from the audience to the film and back. Each person is looking and thinking and feeling and coming up with his or her own sense of things. And it's probably different from what I fell in love with.
So you don’t know how it's going to hit people. But if you thought about how it's going to hit people, or if it's going to hurt someone, or if it's going to do this or do that, then you would have to stop making films. You just do these things that you fall in love with, and you never know what's going to happen.

Variant: Life is like a novel. It's filled with suspense. You have no idea what is going to happen until you turn the page.

Interview with Martin Gayford, Independent on Sunday 26 May 2002
Other

Source: Teen Idol

Nerdist podcast, episode #25 http://www.nerdist.com/2010/07/nerdist-podcast-25-maria-bamford/, July 5, 2012
Other

Source: Point Omega

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.

Source: The Bus Driver Who Wanted to be God & Other Stories