释义：天之险在于高不可升，地之险在于山川丘陵。王公设险以保卫国家，险的功用非常大。

The more determinedly I exist, as myself, within the conditions of the time, the more clearly I shall hear the voice of the eternal.

The goal of business is not just to make money, but to make a difference.

技术只是工具，人才是真正的资产。