The human mind works at low efficiency. Twenty percent is the figure usually given. When, momentarily, there is a flash of greater power, it is termed a hunch, or insight, or intuition.

But people who are capable of thinking clearly are in a minority, of course.

What do you call that nice, shiny white metal they use to make sidings and airplanes out of? Aluminum, right? Aluminum, pronounced 'uh-LOO-mih-num', right? Anybody knows that! But do you know how the British spell it? 'Aluminium', pronounced 'Al-yoo-MIH-nee-um'. Ever hear anything so ridiculous? The French and Germans spell it 'aluminium', too, but they're foreigners who don't speak Earth-standard. You'd think the British, however, using our language, would be more careful

It is almost impossible to think of something no one has thought of before, but it is always possible to add different frills.

I am not responsible for what other people think. I am responsible only for what I myself think, and I know what that is. No idea I've ever come up with has ever struck me as a divine revelation. Nothing I have ever observed leads me to think there is a God watching over me.

I type 90 words per minute on the typewriter; I type 100 words per minute on the word processor. But, of course, I don't keep that up indefinitely - every once in a while I do have to think a few seconds.

Old people think young people haven't learned about love. Young people think old people have forgotten about love.

Why ... did so many people spend their lives not trying to find answers to questions -- not even thinking of questions to begin with? Was there anything more exciting in life than seeking answers?

While he lives, he must think; while he thinks, he must dream.