老年并不有趣,直到你真正到达那个年纪。
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.
"The greatest tragedy is not the brutality of the bad people, but the silence of the good people."