You know they're quite little worlds of themselves.

They're all bigger than our moon, except Europa.

Ganymede, in fact, is two-thirds bigger than Mercury, and if old Jupiter is still in a state of fiery incandescence there's no reason why we shouldn't find on Ganymede or one of the others the same state of things that existed on our moon when the Earth was blazing hot." "I shouldn't wonder," said Zaidie; "I've often heard my father say that that was probably what happened.

It's all very marvellous, isn't it?
death in one place, life in another, all beginnings and endings, and yet no actual beginning or end of anything anywhere.

That's eternity, I suppose." "It's just about as near as the finite intellect can get to it, I should say," replied Redgrave.