“Iorek Byrnison: Can is not the same as must.Lyra Silvertongue: But if you must and you can, then there's no excuse.”

“Must is not the same as can, Lyra'. 'But if you must and you can, then there's no excuse!”

“She had asked: What is he? A friend or an enemy?The alethiometer answered: He is a murderer.When she saw the answer, she relaxed at once. He could find food, and show her how to reach Oxford, and those were powers that were useful, but he might still have been untrustworthy or cowardly. A murderer was a worthy companion. She felt as safe with him as she'd done with Iorek Byrnison the armoured bear.”

“Like a wave that has been building it's strength over a thousand miles of ocean, and which makes little stir in the deep water, but which, when it reaches the shallows rears itself high up into the sky, terrifying the shore dwellers, before crashing down on land with irresistible power - so Iorek Byrnison rose up against Iofur, exploding upward from his firm footing on the dry rock and slashing with a ferocious left hand at the exposed jaw of Iofur Raknison.”

“It was a shocking thing to say and I knew it was a shocking thing to say. But no one has the right to live without being shocked. No one has the right to spend their life without being offended. Nobody has to read this book. Nobody has to pick it up. Nobody has to open it. And if you open it and read it, you don't have to like it. And if you read it and you dislike it, you don't have to remain silent about it. You can write to me, you can complain about it, you can write to the publisher, you can write to the papers, you can write your own book. You can do all those things, but there your rights stop. No one has the right to stop me writing this book. No one has the right to stop it being published, or sold, or bought, or read.”

“But 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.”

“To get the best out of life here ...Good grief. There's plenty of it about, so indulge. Give yourself some thing to remember. Fall in love. Fall out of love. Gamble. Get drunk. See how long you can stay awake. Go for long walks at night. Discover what you're afraid of doing, and then do it.”