可持续增长的关键是在经济进步和环境责任之间取得平衡。

预测未来的最好方法就是创造未来。

数学的美在于它既是艺术又是科学。

The deep, personal material of the latter half of your life is your children. You can write about your parents when they're gone, but your children are still going to be here, and you're going to want them to come and visit you in the nursing home.