你知道的越多，你就越意識(shí)到你不知道的越多。
The more you know, the more you realize you don't know.
可持續(xù)性不是一種選擇，而是我們對(duì)后代的責(zé)任。
We are to remember that we are not to take anything with us out of this world, and that it is how we have conducted ourselves here that will matter in the end.
The future of democracy depends on the ability of democratic societies to reform themselves.
Meaning comes from belonging to and serving something beyond yourself.