The human being needs sadness as much as he needs joy.
人类需要悲伤,正如需要欢乐一样。
如果我们对待植物像对待孩子一样漫不经心,我们现在就会生活在杂草丛生的丛林里。
永远不要低估小而持续的行动推动大规模变革的力量。
The quarries we rehabilitate best become assets our grandchildren will thank us for.