释义：独具慧眼的人看山崖，能发现未经琢磨的玉石；靠近河川，便能知道水里有珍珠。比喻人应善于观察和学习，方能洞察事物本质。
世界不是游乐场，而是思想和利益的战场。
As to the gods, I do not know whether they exist or not, nor what they are like in form; for there are many things that hinder sure knowledge, the obscurity of the matter and the shortness of human life.