The secret of being miserable is to have leisure to bother about whether you are happy or not.
暴力是这个世界唯一真实的东西。
诸如此类。
化学是一门研究物质性质及其变化的科学。
古代的学者，为自己才学不高而担忧，就发奋学习，迎头赶上；现在的文士，为自己才学不高而羞愧，就隐满短处，避忌批评。
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？”