"[Not enough is known about solid geometry] and for two reasons: in the first place, no government places value on it; this leads to a lack of energy in the pursuit of it, and it is difficult. In the second place, students cannot learn it unless they have a teacher. But then a teacher can hardly be found."

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There's some that came here never believing they were dead. They insisted all the way that they were alive, it was a mistake, someone would have to pay; made no difference. There's others who longed to be dead when they were alive, poor souls; lives full of pain or misery; killed themselves for a chance of a blessed rest, and found that nothing had changed except for the worse, and this time there was no escape; you can't make yourself alive again.

— Philip Pullman