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I don't think about age. I think about spirit. I think about how I feel inside.
Mathematics is the key and door to the sciences.
写作是一种存在于世界的方式,一种理解它的方式,以及一种改变它的方式。
"Every mental state is transitional."
幸福是通过美德获得的,是人自己意愿获得的善。