Isn't killing people in the name of God a pretty good definition of insanity?

No trilogy should have more than four books.

Judge me by my deeds, though they are few, rather than my words, though they are many.

At the present rate of progress, it is almost impossible to imagine any technical feat that cannot be achieved - if it can be achieved at all - within the next few hundred years.

It was one thing to have guessed it, another to have had that guess confirmed beyond possibility of refutation.

Now times had changed, and the inherited wisdom of the past had become folly.

He found it both sad and fascinating that only through an artificial universe of video images could she establish contact with the real world.