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The real is not only what can be reproduced, but that which is always already reproduced. That is the hyperreal.
To live remains an art which everyone must learn,and which no one can teach.
In mathematics, the art of proposing a question must be held of higher value than solving it.
身虽处天地万物之后,心却不在天地万物之前;身虽处天地万物之中,而心却在天地万物之上。