解析：言行应以收敛为主。
最好的管理是一门真正的科学，建立在明确的法律、规则和原则之上。
No man's knowledge here can go beyond his experience.
The greatest gift you can give someone is your time, because you are giving them a portion of your life that you will never get back.
"The past is always present, it's just that sometimes it's more present than at other times."
"To understand who we are, we must first understand where we come from."
可持续的世界始于可持续的选择。