What other things? For one, it's clean. One of the paradoxes of rain is how clean it is coming down and how much mud it can make when it lands. So if you want a character to be cleansed, symbolically, let him walk through the rain to get somewhere. He can be quite transformed when he gets there. He may also have a cold, but that's another matter. He can be less angry, less confused, more repentant, whatever you want. The stain that was upon him - figuratively - can be removed On the other hand, if he falls down, he'll be covered in mud and therefore more stained than before. You can have it either way, or both ways if you're really good.
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On the other hand, rain is also restorative, This is chiefly because of its association with spring, but Noah once again comes into play here. Rain can bring the world back to life, to new growth, to the return of the green world.
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Rain is the principal element of spring. Spring is the season not only of renewal but of hope, of new awakening.引自第77页