年轻人不知道谨慎,因此他们尝试不可能的事情,并一代又一代地实现它。
The young do not know enough to be prudent, and therefore they attempt the impossible, and achieve it, generation after generation.
凡事天下要考察有无的原则,必定是以众人的耳目所见所闻的实情以知有与无来作为标准的。 
One can't proceed from the informal to the formal by formal means.
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。