"Lyra, I'm going to give you something, and you must promise to keep it private. Will you swear to that?"… — Philip Pullman
"Lyra, I'm going to give you something, and you must promise to keep it private. Will you swear to that?"
"Yes," Lyra said.
He crossed to the desk and took from a drawer a small package wrapped in black velvet. When he unfolded the cloth, Lyra saw something like a large watch or a small clock: a thick disk of gold and crystal. It might have been a compass or something of the sort.
"What is it?" she said.
"It's an alethiometer. It's one of only six that were ever made. Lyra, I urge you again: keep it private. It would be better if Mrs. Coulter didn't know about it. Your uncle — "
"But what does it do?"
"It tells you the truth. As for how to read it, you'll have to learn by yourself. Now go — it's getting lighter — hurry back to your room before anyone sees you."
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More from this book
"That light," said the Chaplain, "is it going up or coming down?"
"It's coming down," said Lord Asriel, "but it isn't light. It's Dust."
Something in the way he said it made Lyra imagine dust with a capital letter, as if this wasn't ordinary dust. The reaction of the Scholars confirmed her feeling, because Lord Asriel's words caused a sudden collective silence, followed by gasps of incredulity.
"But suppose your dæmon settles in a shape you don't like?"
"Well, then, you're discontented, en't you? There's plenty of fold as'd like to have a lion as a dæmon and they end up with a poodle. And till they learn to be satisfied with what they are, they're going to be fretful about it. Waste of feeling, that is."
Think of Adam and Eve like an imaginary number, like the square root of minus one: you can never see any concrete proof that it exists, but if you include it in your equations, you can calculate all manner of things that couldn’t be imagined without it.

