A healthy animal is the foundation of a healthy food chain.

In the world of mathematics, imagination is more important than knowledge.

我不知道是妈妈对，还是丹中尉对，我不知道，是否我们每个人都有，注定的命运，还是我们的生命中只有偶然，像在风中飘。但我想：也许两者都有吧，也许两者都在同时发生着。

当我们本应更明智地保护自己免受其害时，纯真总是默默地呼唤保护：纯真就像一个失去了铃铛的哑巴麻风病人，漫游世界，无意伤害。

A wise man said: before you speak， let your words pass through three gates. At the first gate， ask yourself， "Is it true？" At the second gate， ask "Is it necessary？" At the third gate， ask， "Is it kind？"

淡泊平静，忧患就不能影响，邪气就不能侵袭，就德性完备而精神不损。