But the river, though it flowed so slowly, had still a sense of movement and it gave one a melancholy feeling of the transitoriness of things.

但这河水，虽然得那么慢，却还有动感觉， 给人世事无常惆怅。

How should he not know love, he, who has discovered all elements of human existence in their transitoriness, in their meaninglessness, and yet loved people thus much, to use a long, laborious life only to help them, to teach them!

他怎么会不懂得爱呢，他已经发现了人类存在所有要素短暂，在它们无意义中，却如此热爱人们，用漫长而艰苦生命来帮助他们，教导他们！