A good book should be an axe to break the frozen sea within us.

发现可能性的极限的唯一方法是冒险稍微超越它们进入不可能。

The best teacher is the one who suggests rather than dogmatizes, and inspires his listener with the wish to teach himself.

进步主要取决于人类本性中最强大而不仅仅是最高尚的力量能否被用于增加善。