“As long as a thing is unknown, it belongs to us in a way that well-known things do not. For we have the opportunity to fill the empty, unknown spaces for ourselves, and in them there is room for imagination and for hope.”

“Something about making art has to do with overcoming things, giving us a clear opportunity for doing things in ways we have always known we should do them.”

“Reports that say that something hasn't happened are always interesting to me, because as we know, there are known knowns; there are things we know we know. We also know there are known unknowns; that is to say we know there are some things we do not know. But there are also unknown unknowns- the ones we don't know we don't know.”

“And for once, Donald Rumsfeld, in the news at the time over the Iraq war made sense to me: "As we know," he said, famously, "there are known knowns-things we know we know. We also know there are known unknowns-things we know we don't know. But there are also unknown unknowns- things we don't know we don't know.”

“Shall we educate ourselves in what is known, and then casting away all we have acquired, turn to ignorance for aid to guide us among the unknown?”

“There are things known and there are things unknown, and in between are the doors of perception.”