When we are planning for posterity, we ought to remember that virtue is not hereditary.
The facts are always friendly, every bit of evidence one can acquire, in any area, leads one that much closer to what is true.
人不能在他的历史中表现出他自己,他在历史中奋斗着露出头角。
可持续性不是一种选择,而是我们对下一代的责任。