Nature tends to produce constancy in all her works, but she does not always succeed.
可持续性不是一种趋势,而是能源的未来。
你无法取悦所有人,所以别尝试。
如果自由不包括犯错的自由,那么自由就不值得拥有。
The farmer is the only man in our economy who buys everything at retail, sells everything at wholesale, and pays the freight both ways.