????Thinking is easy, acting is difficult, and to put one's thoughts into action is the most difficult thing in the world.

????思考是容易的,，行動(dòng)是困難的，而將思想付諸行動(dòng)是世界上最困難的事情。

????——歌德（Johann Wolfgang von Goethe，德國文學(xué)家）