The secret of change is to focus all your energy not on fighting the old, but on building the new.
改变的秘诀在于集中所有精力不是与旧事物斗争，而是建设新事物。
预测未来的最好方式就是创造它。
We begin with the hypothesis that any subject can be taught effectively in some intellectually honest form to any child at any stage of development.
健康的森林生态系统同时支持自然和商业。