Happiness resides not in possessions and not in gold; the feeling of happiness dwells in the soul.
国家是理性的行为体,它们寻求最大化相对权力,以确保在竞争性的国际体系中生存。
我不害怕失败。我害怕不去尝试。
Mastery is not a function of genius or talent. It is a function of time and intense focus applied to a particular field of knowledge.