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You have to write the book that wants to be written. And if the book will be too difficult for grown-ups, then you write it for children.
最糟糕的人是那些让别人因为对某事感到兴奋而感到糟糕、愚蠢或愚蠢的人。
The best fertilizer is the farmer’s shadow in the field.
Grow old along with me! The best is yet to be.
The essence of mathematics is not to make simple things complicated, but to make complicated things simple.
To love to read is to exchange hours of ennui for hours of delight.