理论的任务不仅是了解自然是什么以及它是如何运作的,而且要尽可能接近理解为什么自然是这样的而不是其他样子的不可达到的目标。
The value or worth of a man is, as of all other things, his price; that is to say, so much as would be given for the use of his power.