Quality is never an accident; it is always the result of intelligent effort.

We must balance the need for energy security with the imperative of reducing emissions.

"The temporary is sometimes more powerful than the permanent."

如果名分不正理论上便讲不通，理论上讲不通，事情便办不成；……因此，君子给某种事物起名字时，就一定要在理论上讲得通，在实践上就一定能行得通。