我不认为有什么极限。
We don't inherit the oceans from our ancestors; we borrow them from our children.
夏天的飞鸟,飞到我窗前唱歌,又飞去了。秋天的黄叶,他们没有什麽可唱的,只是叹息一声,飞落在那里。
The only freedom which deserves the name is that of pursuing our own good in our own way, so long as we do not attempt to deprive others of theirs, or impede their efforts to obtain it.