Innovation is seeing what everybody has seen and thinking what nobody has thought.

The speed of change is such that we have to run faster just to stay in the same place.

世界上最让我难以理解的就是所得税。

A true mathematician is always a student, always learning.

The right of a nation to kill a tyrant in case of necessity can never be doubted until the right of a tyrant to kill a nation has been proved.

【释义】：圣人处世的道理是灵活多变的，能根据时机和环境变化而采取合宜的行动，不拘泥于固定的方式。