A good sentence should have a kind of tension in it.

身体是心灵的乐器，体育教育就是对这种乐器的调音。

There is a stubbornness about me that never can bear to be frightened at the will of others. My courage always rises at every attempt to intimidate me.

最好的企业不仅仅是适应变化，而是推动变化。