What do you get if you multiply six by nine?" "Six by nine. Forty two." "That's it. That's all there is." "I always thought something was fundamentally wrong with the universe

I only know as much about myself as my mind can work out under its current conditions. And its current conditions are not good.

He was a man who was charged with the work he did in life because he was not one to ask questions — not so much on account of any natural quality of discretion as because he simply could never think of any questions to ask.

All opinions are not equal. Some are a very great deal more robust, sophisticated and well supported in logic and argument than others.

Bypasses are devices that allow some people to dash from point A to point B very fast while other people dash from point B to point A very fast. People living at point C, being a point directly in between, are often given to wonder what's so great about point A that so many people from point B are so keen to get there and what's so great about point B that so many people from point A are so keen to get there. They often wish that people would just once and for all work out where the hell they wanted to be.

Was there a reason behind it? There would be no point in asking Zaphod, he never appeared to have a reason for anything he did at all: he had turned unfathomability into an art form. He attacked everything in life with a mixture of extraordinary genius and naive incompetence and it was often difficult to tell which was which.

To Trin Tragula's horror, the shock completely annihilated her brain; but to his satisfaction he realized that he had proved conclusively that if life is going to exist in a Universe of this size, then the one thing it cannot afford to have is a sense of proportion.