The world is dark, and light is precious.
世界是黑暗的，而光弥足珍贵。
我从不担心行动。而只担心没有任何行动。
【译文】 孔子说：“知道学习不如喜欢学习，喜欢学习不如以学习为快乐。”
如果你是战士，别为你自己的自由而战，而要为你战友的自由而战。这样，战争对你俩来说，就会更加鼓舞人心。
Mathematics is a collaborative endeavor. No one does it alone.
"Books are the quietest and most constant of friends; they are the most accessible and wisest of counselors, and the most patient of teachers."