"Light is important to us humans. It influences our moods, our perceptions, our energy levels. A face glimpsed among trees, dappled by the shadows and the green-tinged light reflected from the forest, will seem quite different to the same face seen on a beach in hard, dry, sunlight, or in a darkening room at twilight, with the shadows of a venetian blind striped across it like a convict’s uniform."

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That narrow stretch of sand knows nothing in the world better than it does the white waves that whip it , caress it , collapse on to it . The white foam knows nothing better than those sands which wait for it , rise to it and suck it in .but what do the waves know of the massed, hot, still sands of the desert just twenty , no , ten feet beyond the scalloped edge ? And what does the beach knows of depths, the cold, the currents just there, where-do you see it? - Where the water turns a deeper blue.

— Ahdaf Soueif