The essence of learning is the acquisition of meanings.

The world loved man when he smiled. The world became afraid of him when he laughed.

解释：外表不端正的人，是因为德没有养成；内里不专—的人，是因为心没有治好。端正形貌，整饬内德，使万物都被掌握理解。

A nation that destroys its soils destroys itself.

Life is really simple, but we insist on making it complicated.

I was seldom able to see an opportunity until it had ceased to be one.

最危险的谎言是我们对自己说的那些。