系统价值的证明是它的存在。

我给你做了一个很大的巧克力圣代，作为你的饭后甜点，可是我不得不自己把它吃了，因为广播上说冰激凌对狗不好。失望对狗也不好。”

The great growling engine of change—technology.

The more we learn of the true nature of non-human animals, especially those with complex brains and corresponding complex social behaviour, the more ethical concerns are raised regarding their use in the service of man—whether this be in entertainment, as ‘pets,’ for food, in research laboratories or any of the other uses to which we subject them.

事实并不能自证清白。它们支持或者反对不同的理论。而脱离理论或者信念的事实不过是孤立的好奇心而已。

The future is not a result of choices among alternative paths offered by the present, but a place that is created—created first in the mind and will, created next in activity.

The truth is a trap: you cannot get it without it getting you; you cannot get the truth by capturing it, only by its capturing you.

可持续发展不是选择，而是责任。

"We overestimate what we can do in one year and underestimate what we can do in ten."