世界是美丽的，但它有一种叫做人类的疾病。
The world is beautiful, but it has a disease called man.
In the long history of humankind (and animal kind, too) those who learned to collaborate and improvise most effectively have prevailed.
成长从来不是偶然的，而是各种力量共同作用的结果。
The best time to plant a tree was 20 years ago. The second best time is now.
成功不是成为最好的，而是比昨天更好。