The essential quality of life is living' the essential quality of living is change; change is evolution; and we are part of it.

Knowledge is simply a kind of fuel; it needs the motor of understanding to convert it into power.

Knowing makes all the difference... It's the difference between just trying to keep alive, and having something to live for

The humans have a curious force they call ambition. It drives them, and, through them, it drives us. This force which keeps them active, we lack. Perhaps, in time, we machines will acquire it.

When a day that you happen to know is Wednesday starts off by sounding like Sunday, there is something seriously wrong somewhere.

There was often a great deal of grown-up fuss that seemed disproportionate to causes.

It must be, I thought, one of the race's most persistent and comforting hallucinations to trust that "it can't happen here" -- that one's own time and place is beyond cataclysm.