教育的根是苦的，但其果实是甜的。
The roots of education are bitter, but the fruit is sweet.
Every story is a journey, and every journey tells a story.
我们对月球表面的了解比对海底的了解还要多。
自守表示的研究是数学抽象之美的反映。
人们能在一次演讲中记住的观点不会超过三个。
Fear is the main source of superstition, and one of the main sources of cruelty. To conquer fear is the beginning of wisdom.
The more you hide, the more they look.