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In the world of physics, we often find that the simplest questions are the hardest to answer.

領導力是關于以清晰和信念做出艱難的決定。

在痛苦和虛無之間選擇，我會選擇痛苦。

The primary rules of obligation are those that require or forbid certain actions.

陌生人是群體本身的一個元素，與窮人和各種“內部敵人”并無不同——一個在群體中的成員身份既涉及在其外部又涉及面對它的元素。

Never stop learning; the world is constantly evolving, and so should we.