每个人都是道德的铸造者。
Every individual is a moral legislator.
改变令人不适，但停滞是致命的。
The chief beauty about time is that you cannot waste it in advance. The next year, the next day, the next hour are lying ready for you, as perfect, as unspoiled, as if you had never wasted or misapplied a single moment in all your life.
数学是为不同事物赋予相同名称的艺术。
The boldness of his mind was matched by the candor of his speech.
