The course of development consists simply in this; that in each generation the two parental traits appear, separated and unchanged.

解释：清澈与浑浊，细微与宏大，短小与绵长，急促与舒缓，哀伤与快乐，刚硬与柔软，迟滞与快速，高昂与低徊，呼出与收缩，周密与疏朗，因此而相互辅助。

"Science is the highest personification of the nation because that nation will remain the first which carries the furthest the works of thought and intelligence."

I like to be a free spirit. Some don’t like that, but that’s the way I am.

解释：天道远离人间，人道则存在于身边的社会人事之中，可以就近掌握。对于人所难及的事物，如何能知道呢？