“No one can know a false thing, one can only believe it with certainty until it is contradicted. (Page 7)”

“Happiness can depend as easily on useless things as on useful ones.”

“One mind can think only of its own questions; it rarely surprises itself.”

“The criminal misuse of time was pointing out the mistakes. Catching them―noticing them―that was essential. If you did not in your own mind distinguish between useful and erroneous information, then you were not learning at all, you were merely replacing ignorance with false belief, which was no improvement. The part of the man's statement that was true, however, was about the uselessness of speaking up. If I know that the teacher is wrong, and say nothing, then I remain the only one who knows, and that gives me an advantage over those who believe the teacher.”

“If God created our will, then he's responsible for every choice we make... So-- as I recall, the official philosophical answer is that free will doesn't exist. Only the illusion of free will, because the causes of hour behavior are so complex that we can't trace them back. If you've got one line of dominoes knocking each other down, one by one, then you can always say, look, this domino fell because that one pushed it. But when you have an infinite number of dominoes that can be traced back in an infinite number of directions, you can never find where the causal chain begins. So you think, That domino fell because it wanted to... Even if there is no such thing as free will, we have to treat each other as if there were free will in order to live together in society.”

“Free will doesn’t exist. Only the illusion of free will, because the causes of our behavior are so complex that we can’t trace them back. If you’ve got one line of dominoes knocking each other down one by one, then you can always say, Look, this domino fell because that one pushed it. But when you have an infinite number of directions, you can never find where the casual chain begins. So you think, That domino fell because it wanted to.”

“But whether there's some grand design really matters little to me. My only hope was this. To see what could be, and to believe that it should be, and then to do all I could to bring it to pass, whatever the cost. And when a life ends as mine will end, no one can persuade me that the cost was not worth what it has brought me at last.”