The relevant equation is: Knowledge = power = energy = matter = mass; a good bookshop is just a Black Hole that knows how to read.

WHO KNOWS WHAT EVIL LURKS IN THE HEART OF MEN?The Death of Rats looked up from the feast of the potato. SQUEAK, he said.Death waved a hand dismissively. WELL, YES, OBVIOUSLY ME, he said. I JUST WONDERED IF THERE WAS ANYONE ELSE.

Anyone with half a mind could see that," said Tiffany.Miss Tick sighed. "Yes. But sometimes it's so hard to find half a mind when you need one.

Because the universe was full of ignorance all around and the scientist panned through it like a prospector crouched over a mountain stream, looking for the gold of knowledge among the gravel of unreason, the sand of uncertainty and the little whiskery eight-legged swimming things of superstition.

If you do not know where you come from, then you don't know where you are, and if you don't know where you are, then you don't know where you're going. And if you don't know where you're going, you're probably going wrong.