“Suppose someone were to say: 'Imagine this butterfly exactly as it is, but ugly instead of beautiful'?!”

“An honest religious thinker is like a tightrope walker. He almost looks as though he were walking on nothing but air. His support is the slenderest imaginable. And yet it really is possible to walk on it.”

“To imagine a language is to imagine a form of life.”

“I am sitting with a philosopher in the garden; he says again and again 'I know that that’s a tree', pointing to a tree that is near us. Someone else arrives and hears this, and I tell him: 'This fellow isn’t insane. We are only doing philosophy.”

“Uttering a word is like striking a note on the keyboard of the imagination.”

“You sometimes see in a wind a piece of paper blowing about anyhow. Suppose the piece of paper could make the decision: ‘Now I want to go this way.’ I say: ‘Queer, this paper always decides where it is to go, and all the time it is the wind that blows it. I know it is the wind that blows it.’ That same force which moves it also in a different way moves its decisions.”

“Indeed how might it be if things revealed their colors only when (in our terms) no light fell on them - if, for example, the sky were black? Could we not then say, only by black light do they appear to us in their full colors?”