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Information is always tied to something physical. Look, take one of the most abstract of all concepts... Suppose you wanted to communicate sweetness. Now that's a concept that came through the sense of taste. It is as physical as things get. You bite into a lemon meringue pie and that's sweet.
What I'm saying here is that physical things needn't just come into our brains through sight or sound. We can smell, touch, and taste physical things. And we can value them so much that we'll steal the words we use to describe them to apply them elsewhere. Way beyond the realm of taste we can take the idea of sweet - it's wonderful, innocent, delicate, joyful, burst of happiness - and fix it to other similar wonders.
Like a happy young girl in Musser Park wearing her pearls to play with the other children at sunset on a Thursday night. A delightful child who turns to a man with a camera and cajoles, "Take my picture. Please... please... please!" And when the guy looks through his lens he sees a delicate, joyful, innocent, burst of happiness.
Geek Stuff: Canon EOS 20D, Canon EFS 17-85mm (f4-5.6), 1/80 at f/6.3, ISO 400, Focal Length 64mm, Time 6:45pm, Flash; off, Exposure Bias value: -1, Metering Mode: Average, Camera Raw.