Time travel, by its very nature, was invented in all periods of history simultaneously.

The only person for whom the house was in any way special was Arthur Dent, and that was only because it happened to be the one he lived in.

Beethoven tells you what it's like to be Beethoven and Mozart tells you what it's like to be human. Bach tells you what it's like to be the universe.

Many respectable physicists said that they weren't going to stand for this -- partly because it was a debasement of science, but mostly because they didn't get invited to those sort of parties.

Let the past hold on to itself and let the present move forward into the future.

I love deadlines. I like the whooshing noise they make as they go by.

All you really need to know for the moment is that the universe is a lot more complicated than you might think, even if you start from a position of thinking it's pretty damn complicated in the first place.