The same principles which at first view lead to skepticism, pursued to a certain point, bring men back to common sense.
A wise man said, “Before you speak, let your words pass through three gates. At the first gate, ask yourself, “Is it true?” At the second gate ask, “Is it necessary?” At the third gate ask, “Is it kind?”
可持续性不是成本;而是对相关性和持久性的投资。