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Every generation imagines itself to be more intelligent than the one that went before it, and wiser than the one that comes after it.

The land is the real client, not the person who pays the fee.

The pursuit of mathematical truth is a pursuit of beauty, elegance, and simplicity.

I always try to improve myself.

心靈是自己的地方，在那里可以把地獄變成天堂，把天堂變成地獄。