Much of what we see in the universe," said Hugo, "starts out as imaginary. Often you must imagine something before you can come to terms with it. - Clifford D. Simak

A million years ago there had been no river here and in a million years to come there might be no river – but in a million years from now there would be, if not Man, at least a caring thing. And that was the secret of the universe, Enoch told himself – a thing that went on caring.

We thought all the time that we were passing through time when we really weren't, when we never have. We've just been moving along with time. We said, there's another second gone, there's another minute and another hour and another day, when, as a matter of fact the second or the minute or the hour was never gone. It was the same one all the time. It had just moved along and we had moved with it.

Time is still the great mystery to us. It is no more than a concept; we don't know if it even exists...