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.
Philip PullmanThe idea hovered and shimmered delicately, like a soap bubble, and she dared not even look at it directly in case it burst. But she was familiar with the way of ideas, and she let it shimmer, looking away, thinking about something else.
Philip Pullman