“We know everything we knew that was worth knowing, that's a crucial distinction.”

“Nobodys life ever goes according to plan. So why do we keep on planning?Because that's how we know who we are. By what we intend to be. By what we try to become. And fail.I don't say 'fail'. I saw we aim and miss. But we still hit something.”

“I taught you everything you know. But I didn't teach you everything I know.”

“The only teacher that's worth anything to you is your enemy.”

“Perhaps a physicist would know at once why this whole idea was absurd. But then, perhaps a physicist would be so locked into the consensus of his scientific community that it would be harder for him to accept an idea that transformed the meaning of everything he knew. Even if it were true.”

“we have some good ideas here. But the only way to know if they’re workable is to try to make them fail. If we fail to fail, then maybe we’re on the right track.”

“Like Santa Claus. You adults pretend he doesn't exist, but we know that he really does.”