Suffering! We owe to it all that is good in us, all that gives value to life; we owe to it pity, we owe to it courage, we owe to it all the virtues.

理解一个问题就是答案的一半。

Always read the plaque next to the monument.

The greatest threat to our forests isn’t logging—it’s indifference.

I never give up. I keep fighting until the end.