Once upon a time there was a Martian named Valentine Michael Smith.

Anything which is physically possible can always be made financially possible; money is a bugaboo of small minds.

Girls are simply wonderful. Just to stand on a corner and watch them going past is delightful. They don't walk. At least not what we do when we walk. I don't know how to describe it, but it's much more complex and utterly delightful. They don't move just their feet; everything moves and in different directions . . . and all of it graceful.

...a book need never die and should not be killed; books were the immortal part of man.

His older self had taught his younger self a language which the older self knew because the younger self, after being taught, grew up to be the older self and was, therefore, capable of teaching.

Most people who sneer at technology would starve to death if the engineering infrastructure were removed.

Never underestimate the power of human stupidity.