The most profound ideas in mathematics often arise from the simplest observations.

解释：对别人的灾祸而幸灾乐祸是不仁义的，乘别人的危难去攻击不符合武德。

 人们害怕死亡，就像孩子害怕黑暗一样；而且，正如孩子对黑暗的自然恐惧会受到各种故事的加剧一样，人们对死亡的恐惧也是如此。

The key to successful data management is understanding the data. If you don't understand your data, you can't manage it effectively.