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自由是告訴人們他們不想聽的事情的權利。

質量從來不是偶然的；它始終是智慧努力的結果。

"We are all searching for something, but we don't always know what it is. Sometimes it's a person, sometimes it's a place, and sometimes it's just a feeling."

在數學中，提出問題的藝術必須比解決問題更有價值。