求翻译：he smiled . "perhaps climbing up the tower , you have noticed-and yet , not being blind , perhaps you won't-how the sun pours into the tower through the windows here and there , so one can feel the cool steps suddenly become quite warm , even in winter . but behind the wall there is shade . there is no place so good as this for feeling the contrast between light and darkness . though i'm blind , i also want to feel the happiness brought by the sunlight . in fact it isn't my first time to be here . " he said and seemed as pleased as a child .是什么意思？

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