Gradually, at various points in our childhoods, we discover different forms of conviction. There's the rock-hard certainty of personal experience ("I put my finger in the fire and it hurt,"), which is probably the earliest kind we learn. Then there's the logically convincing, which we probably come to first through maths, in the context of Pythagoras's theorem or something similar, and which, if we first encounter it at exactly the right moment, bursts on our minds like sunrise with the whole universe playing a great chord of C Major.

People are too complicated to have simple labels.

...when all the openings were closed, then the worlds would all be restored to their proper relations with one another, Lyra’s Oxford and Will’s would lie over each other again, like transparent images on two sheets of film being moved closer and closer until they merged–although they would never truly touch.

I'll be looking for you, Will, every moment, every single moment. And when we do find each other again, we'll cling together so tight that nothing and no one'll ever tear us apart. Every atom of me and every atom of you... We'll live in birds and flowers and dragonflies and pine trees and in clouds and in those little specks of light you see floating in sunbeams... And when they use our atoms to make new lives, they wont' just be able to take one, they'll have to take two, one of you and one of me, we'll be joined so tight.

I stopped believing there was a power of good and a power of evil that were outside us. And I came to believe that good and evil are names for what people do, not for what they are.

Everything means something.

We don't need lists of rights and wrongs, tables of do's and don'ts: we need books, time, and silence. Thou shalt not is soon forgotten, but Once upon a time lasts forever.