【讲解】：古代读书人学习的目的，在于修养自己的学问道德（然后去为国家、人民服务），现在读书人学习的目的，在于给别人看（希望得到别人的赞美和任用）。

He always fought, that s what I remember. He fought because he knew if he didn t fight, it would make it that much easier not to fight the next time.

Sustainability must be profitable, or it won't be sustainable.

The harder you work for something, the greater you’ll feel when you achieve it.