“I may not have been sure about what really did interest me, but I was absolutely sure about what didn't.”

“What I don't think has been talked about is the fact that in order to be Hell, the people in Hell could never be sure they were really there.”

“I'VE NEVER BEEN VERY SURE ABOUT WHAT IS RIGHT, said Bill Door. I AM NOT SURE THERE IS SUCH A THING AS RIGHT. OR WRONG. JUST PLACES TO STAND.”

“No one hid their interest when I walked into the room. I'm not sure if it was the news about Boo or my general appearance. At home, people would have asked. People would have been crawling all over me for information. At Wexford, they seemed to extract what they wanted to know by covert staring.”

“I do not rest on the broad upland of a system that includes a series of sure statements about the absolutes, but on a narrow, rocky ridge between the gulfs where there is no sureness of expressible knowledge but [only] the certainty of meeting what remains, undisclosed.”

“I’m sure I am wrong about many things, although I’m not sure exactly which things I’m wrong about. I’m even sure I’m wrong about what I think I’m right about in at least some cases.”