Behind every man now alive stand thirty ghosts, for that is the ratio by which the dead outnumber the living.
This is the first age that's ever paid much attention to the future, which is a little ironic since we may not have one.
The more wonderful the means of communication, the more trivial, tawdry, or depressing its contents seemed to be.
What was more, they had taken the first step toward genuine friendship. They had exchanged vulnerabilities.
New ideas pass through three periods: 1) It can't be done. 2) It probably can be done, but it's not worth doing. 3) I knew it was a good idea all along!
The best measure of a man's honesty isn't his income tax return. It's the zero adjust on his bathroom scale.
Sometimes I think we're alone in the universe, and sometimes I think we're not. In either case the idea is quite staggering.
We have to abandon the idea that schooling is something restricted to youth. How can it be, in a world where half the things a man knows at twenty are no longer true at forty.
It is not easy to see how the more extreme forms of nationalism can long survive when men have seen the Earth in its true perspective as a single small globe against the stars.
Before you become too entranced with gorgeous gadgets and mesmerizing video displays, let me remind you that information is not knowledge, knowledge is not wisdom, and wisdom is not foresight.
Creativity is a uniquely human trait that, when nurtured and cultivated, can lead to incredible breakthroughs in understanding and achievement.
Sometimes I think we're alone in the universe, and sometimes I think we're not. In either case, the idea is quite staggering.
Reading computer manuals without the hardware is as frustrating as reading sex manuals without the software.
We have to abandon the idea that schooling is something restricted to youth. How can it be, in a world where half the things a man knows at twenty are no longer true at forty—and half the things he knows at forty hadn’t been discovered when he was twenty?
Science fiction is something that could happen - but usually you wouldn't want it to. Fantasy is something that couldn't happen - though often you only wish that it could.
Two possibilities exist: either we are alone in the Universe or we are not. Both are equally terrifying.
New ideas pass through three periods: It can't be done. It probably can be done, but it's not worth doing. I knew it was a good idea all along!
The only way of discovering the limits of the possible is to venture a little way past them into the impossible.
