The only limits that exist are the ones in your mind.
The most dangerous thing is not failure, but complacency.
用心管理的森林才能长久存在。
To understand the present, you must first understand the past.
在一个国家中,一个公民的自由就是所有人的自由。
世界是一面镜子,我们在其中看到自己。
对自然的研究是永恒的乐趣。