可持续发展不再是选择；它是当今世界生存的必要条件。
Sustainability is not a choice anymore; it's a necessity for survival in today's world.
【大意】人的贪欲多了，就会亏损道义；忧虑多了，就会损害智慧；畏惧多了，就会伤害勇气。
不要被竞争驱动，而是被愿景驱动。
Play is the language of childhood, and books should speak that language too.
The most important victories are the ones that come after the toughest defeats.