Astronomy, as nothing else can do, teaches men humility.

Our own grandchildren may demonstrate that-sometimes- Gigantic is Beautiful.

Space is what stops everything from happening in the same place.

If we have learned one thing from the history of invention and discovery, it is that, in the long run-and often in the short one-the most daring prophecies seem laughably conservative.

There is the possibility that humankind can outgrow its infantile tendencies, as I suggested in 'Childhood's End.' But it is amazing how childishly gullible humans are.

The success of a science fiction writer is if he can write a good read.

They will have time enough, in those endless aeons, to attempt all things, and to gather all knowledge... no Gods imagined by our minds have ever possessed the powers they will command... But for all that, they may envy us, basking in the bright afterglow of Creation; for we knew the Universe when it was young.