“I see your point. It irks you to see anyone at all who is able to work permitted to live without working. But why do you consider work a virtue?”

“Jealousy is a disease, love is a healthy condition. The immature mind often mistakes one for the other, or assumes that the greater the love, the greater the jealousy - in fact, they are almost inc...”

“May you live as long as you wish and love as long as you live.”

“It is almost impossible to shake of one's earliest training. Duke, can you get it through your skull that had you been brought up by Martians, you would have the same attitude toward eating and bei...”

“Your enemy is never a villain in his own eyes. Keep this in mind; it may offer a way to make him your friend. If not, you can kill him without hate and quickly.”

“Anybody can look at a pretty girl and see a pretty girl. An artist can look at a pretty girl and see the old woman she will become. A better artist can look at an old woman and see the pretty girl ...”

“Philosophers, for example, often fail to recognize that their remarks about the universe apply also to themselves and their remarks. If the universe is meaningless, so is the statement that it is so.”

“It is so difficult - at least, I find it difficult - to understand people who speak the truth.”

“When you perceive a truth, look for the balancing truth.”

“You cannot teach a man anything, you can only help him find it within himself.”

“It is easier to write a book with footnotes than the same book written so that children can understand it.”

“I never teach my pupils, I only attempt to provide the conditions in which they can learn.”

“Okay, try this on for size, Tall, Dark and Handsome. I won't be born for almost seven hundred hundred years. How's that strike you?”

“He met me at the airport; it was ten in the morning, Washington time, when I arrived, after having taken a plane that left Los Angeles International at 10:10 A.M. Los Angeles time. Who says time-re...”

“You're from the future, Mr Netherton?""Not exactly," he said. "I'm in the future that would result from my not being here. But since I am, it isn't your future. Here.”