“‎You cannot correct an old person every time they say something offensive. You would never make it through Thanksgiving dinner!”

“And then he says something like this ... "I would die for you. But I won't live for you." Something like that. I think the idea is that every person has to live for his or her own life and then make the choice to share it with other people.”

“In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion.”

“I did know what it meant when you say you promise something. You have to say that you will never do something again and then you must never do it because that would make the promise a lie.”

“If you’re the kind of person who has no guts, you just give up every time life pushes you. If you’re that kind of person, you’ll live all your life playing it safe, doing the right things, saving yourself for something that never happens. Then, you die a boring old man.”

“If you would cure anger, do not feed it. Say to yourself: 'I used to be angry every day; then every other day; now only every third or fourth day.' When you reach thirty days offer a sacrifice of thanksgiving to the gods.”