The present state of the system of nature is evidently a resultant 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.

如果你想知道一家公司的价值，看看它的股价。

数学中的每一个问题都是学习新东西的机会。

The secret to living is giving.

为爱而爱，是神；为被爱而爱，是人。