时间在被小齿轮滴答作响时是死的；只有当钟停止时，时间才会复活。
Time is dead as long as it is being clicked off by little wheels; only when the clock stops does time come to life.
我的孩子们教会我，爱是没有极限的。
——2008年2月19日在斯坦福大学演讲
The best preparation for good work tomorrow is to do good work today.
To feed the world, we must first learn to respect the limits of our planet.