The customer may not always be right, but they are always the customer.
"A book is a version of the world. If you do not like it, ignore it; or offer your own version in return."
至今一切社会的历史都是阶级斗争的历史。
Hope is not a feeling; it is a doable thing.
认真对待你喜欢的一切,除了你自己。
Mathematics is the language with which God has written the universe.