Security is not a product, but a capability.

The collaboration between theory and experiment is essential for the advancement of physics.

要理解一个地方，你必须首先理解它是如何形成的。

释义：谦虚的人处在尊高之位，道德会更加光明，处在卑下之位，其德行人们也难以超越。只有君子才能够保持谦德至终。