Today is difficult, tomorrow is more difficult, but the day after tomorrow is beautiful.

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.

在气候多变的时代，适应是生存的关键。