The only person who cannot be helped is that person who blames others.
The pure work implies the disappearance of the poet as speaker.
每个数学问题都有一个解决方案;这只是找到正确视角的问题。
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.
The most profound discoveries in mathematics often come from the simplest observations.
可持续林业不是一种选择;它是一种义务。
Words are not mere sounds or marks, but signs of facts.
There are other reasons --There are other reasons why it's perhaps harder now to feel calm than ever before. One of these, and it's paradoxical, because it's linked to something that's rather nice, is the hope we all have for our careers. Never before have expectations been so high about what human beings can achieve with their life span.