【解释】脑力劳动者统治人，体力劳动者被人统治；被统治者养活别人，统治者靠别人养活，这是通行天下的原则。
The key to solving complex problems is breaking them down into simpler ones.
The world is a book, and those who do not travel read only a page.
El miedo es la prisión del corazón.