简单的东西往往能唤起最强烈的情感。

A man is rich in proportion to the number of things which he can afford to let alone. That man is the richest whose pleasures are the cheapest.

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.