“People who think they know everything are annoying to those of us who do.”

“Those people who think they know everything are a great annoyance to those of us who do.”

“For everything that you do, there are people who appreciate your work and then there are those who don't. I think very few people have the guts to be sure of what they are doing, believe in it, and then go ahead and do it, irrespective of what people think.”

“Everybody knows that we like those who resemble us, those who think and feel as we do. But the opposite is no less true. It very often happens that we feel kindly towards those who do not resemble us, precisely because of this lack of resemblance.”

“Sometimes I think the only real division into two is between people who divide everything into two and those who don't.”

“there are three kinds of people in the world: those who don't know and don't know they don't know; those who don't know and do know they don't know; and those who know and know how much they still don't know.”

“The people who know God well—mystics, hermits, prayerful people, those who risk everything to find God—always meet a lover, not a dictator.”

“There are two classes, those who want to know and do not care whether others think they know or not, and those who do not much care about knowing but care very greatly about being reputed as knowing.”

“I want to know that I've done everything I could every day I think of all those people out there who are depending on us. I think about it. It does make me feel we need more work, more help. Get those spectators on the playing field, or out of the arena. Really, that is how I feel about it. I do what I can, and I do it the way I do everything… there's nothing part of the way for me.”

“Here's a quick rule of thumb: Don't annoy science fiction writers. These are people who destroy entire planets before lunch. Think of what they'll do to you.”