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"The essence of mathematics lies in its freedom."

One ought never to turn one's back on a threatened danger and try to run away from it. If you do that, you will double the danger. But if you meet it promptly and without flinching, you will reduce the danger by half.

在危機時刻，真正的領(lǐng)導(dǎo)力體現(xiàn)在冷靜、清晰和同理心。

人生要開心，否則只會痛苦。