Sustainability is not an option—it's a responsibility we owe to the next generation.
可持续性不是一种选择,而是我们对下一代的责任。
I'm not a believer, I'm a knower.
The best teacher is the one who suggests rather than dogmatizes, and inspires his listener with the wish to teach himself.
如果你因失去了太阳而流泪,那么你也失去了群星。