The key to building a successful business is to focus on creating value for your customers.
释义：善恶的行为和结果都会非常明显，就像影子紧随着身体一样，无法隐藏。强调了一个人行为的善恶最终都会得到相应的显现和回报。
People can be divided into these types: strangers, acquaintances, familiar people, friends, and close friends. True friendship isn't about compliments to your face, but whether you're mentioned when they talk about friends behind your back.
实验的语言比任何推理都更具权威性：事实可以摧毁我们的推理，但反之则不然。
"A story is a letter that the author writes to himself, but others are allowed to read."