凡是能够说的，都能够说清楚；对于不可说的东西我们必须保持沉默。

Profitability and environmental stewardship can—and must—go hand in hand.

最可怕的怪物是潜伏在我们灵魂深处的那些。

The present state of the system of nature is evidently a consequence of what it was in the preceding moment, and if we conceive of an intelligence which at a given instant comprehends all the relations of the entities of this universe, it could state the respective positions, motions, and general effects of all these entities at any time in the past or future.