What we need is a plan B ... independent of the Internet. [It] doesn't necessarily have to have the performance of the Internet, but the police department has to be able to call up the fire department.

I am convinced that we humans are just at the beginning of our journey, on our way to becoming something more wonderful than we can imagine.

If transportation technology was moving along as fast as microprocessor technology, then the day after tomorrow I would be able to get in a taxi cab and be in Tokyo in 30 seconds.

The computers are in control. We just live in their world.

I'm as fond of my body as anyone, but if I can be 200 with a body of silicon, I'll take it.

[Language is] really a pretty amazing invention if you think about it. Here I have a very complicated, messy, confused idea in my head. I'm sitting here making grunting sounds and hopefully constructing a similar messy, confused idea in your head that bears some analogy to it.

A novice was trying to fix a broken Lisp machine by turning the power off and on. Knight, seeing what the student was doing, spoke sternly: "You cannot fix a machine by just power-cycling it with no understanding of what is going wrong." Knight turned the machine off and on. The machine worked.