The concept of legal obligation is central to the understanding of law.

真正的悲剧是那个人生中从未为他的一次至高无上的努力振作过，从未发挥过他的全部能力，从未挺直过他的全身。

One of the advantages of being old is that you can speak your mind without worrying about the consequences.

商业中最强大的工具不是金钱或技术，而是信任。