Robert Sheckley quote: “It might have meant something, or it might not have. That was the thing about uncertainty, you were never sure.”

“Of course, you have to remind yourself that you might be seeing things that were never there. You might be maneuvering your memories to bring them into line with what you’d want them to be. You can’t be sure you’re not just daydreaming.”

Algis Budrys book Who?

Source: Who? (1958), p. 119

“It's funny how many times in life I've found myself rolling full steam ahead toward something I was sure I'd never do. Whatever might happen in life, whether I liked it or didn't like it, I could know one thing for sure: it would change. There was absolute certainty in uncertainty, in some ways an enormous comfort.”

Steph Davis (1973) American rock climber

Learning to Fly: A Memoir of Hanging On and Letting Go (New York: Touchstone, 2015), pp. 83 https://books.google.it/books?id=IIDRCgAAQBAJ&pg=PA83-84.

“I can live with doubt, and uncertainty, and not knowing. I think it's much more interesting to live not knowing than to have answers which might be wrong. I have approximate answers, and possible beliefs, and different degrees of certainty about different things, but I'm not absolutely sure of anything. There are many things I don't know anything about, such as whether it means anything to ask "Why are we here?"”

Richard Feynman book The Pleasure of Finding Things Out

I might think about it a little bit, and if I can't figure it out then I go on to something else. But I don't have to know an answer. I don't feel frightened by not knowing things, by being lost in the mysterious universe without having any purpose — which is the way it really is, as far as I can tell. Possibly. It doesn't frighten me.
Source: No Ordinary Genius (1994), p. 239, from interview in "The Pleasure of Finding Things Out" (1981): video http://www.youtube.com/watch?v=NEwUwWh5Xs4&t=48m10s

“It might seem as the hardest thing to do, but you have to forget the guy who forgot about you.”

Nicholas Sparks book The Notebook

Source: The Notebook

“I can live with doubt, and uncertainty, and not knowing. I think it's much more interesting to live not knowing than to have answers which might be wrong. I have approximate answers, and possible beliefs, and different degrees of certainty about different things, but I'm not absolutely sure of anything. There are many things I don't know anything about, such as whether it means anything to ask "Why are we here?" I might think about it a little bit, and if I can't figure it out then I go on to something else. But I don't have to know an answer. I don't feel frightened by not knowing things, by being lost in the mysterious universe without having any purpose — which is the way it really is, as far as I can tell. Possibly. It doesn't frighten me.”

Richard Feynman book The Pleasure of Finding Things Out

Source: No Ordinary Genius (1994), p. 239, from interview in "The Pleasure of Finding Things Out" (1981): video http://www.youtube.com/watch?v=NEwUwWh5Xs4&t=48m10s