“To keep every cog and wheel is the first precaution of intelligent tinkering.”

“The last word in ignorance is the man who says of an animal or plant, "What good is it?" If the land mechanism as a whole is good, then every part is good, whether we understand it or not. If the biota, in the course of aeons, has built something we like but do not understand, then who but a fool would discard seemingly useless parts? To keep every cog and wheel is the first precaution of intelligent tinkering.”

“I'm worried that students will take their obedient place in society and look to become successful cogs in the wheel - let the wheel spin them around as it wants without taking a look at what they're doing. I'm concerned that students not become passive acceptors of the official doctrine that's handed down to them from the White House, the media, textbooks, teachers and preachers.”

“Intelligence is like four-wheel drive. It only allows you to get stuck in more remote places.”

“We have to reinvent the wheel every once every once in a while, not because we need a lot of wheels; but because we need a lot of inventors.”

“Tinkerers built America. Benjamin Franklin, Thomas Edison, Henry Ford, all were tinkerers in their childhood. Everything from the airplane to the computer started in somebody's garage. Go back even further: the Industrial Revolution was a revolution of tinkerers. The great scientific thinkers of eighteenth-century England couldn't have been less interested in cotton spinning and weaving. Why would you be? It was left to a bloke on the shop floor who happened to glance at a one-thread wheel that had toppled over and noticed that both the wheel and the spindle were still turning. So James Hargreaves invented the spinning jenny, and there followed other artful gins and mules and frames and looms, and Britain and the world were transformed. By tinkerers rather than thinkerers. "Technological change came from tinkerers," wrote Professor J.R. McNeill of Georgetown, "people with little or no scientific education but with plenty of hands-on experience." John Ratzenberger likes to paraphrase a Stanford University study: "Engineers who are great in physics and calculus but can't think in new ways about old objects are doomed to think in old ways about new objects." That's the lesson of the spinning jenny: an old object fell over and someone looked at it in a new way.”