欲为树人计，所当师四夷。
若要培养人才，就应当向四方外国学习。
人民有三种忧患：饥饿的得不到食物、寒冷的得不到衣物、劳苦的得不到休息。
The iron rule of nature is: You get what you reward for.If you want ants to come, you put sugar on the floor.