Sustainability is not about doing less harm - it's about doing more good.
可持续发展不是减少伤害,而是创造更多益处。
Freeing yourself was one thing, claiming ownership of that freed self was another.
言多必失,要谨言慎行,不要盲目争强好胜。  
自由始于无知结束之时。
If you don't give up, you still have a chance. Giving up is the greatest failure.
The only limit to our realization of tomorrow will be our doubts of today.