"The worth of things can't be measured by what they cost but by what the cost you to get it, that if anything costs you your faith or your family, then the price is too high, and that there are some things that will never wear out."

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If a witch needs something, another witch will give it to her. If there is war to be fought, we don't consider cost one of the factors in deciding whether or not it is right to fight. Nor do we have any notion of honor. An insult to a bear is a deadly thing. To us...inconceivable. How could you insult a witch? What would it matter if you did?

— Philip Pullman