一年中的夜晚与白天数量相同、持续时间一样长。即使快乐的生活也有其阴暗笔触，没有“悲哀”提供平衡，“愉快”一词就会失去意义。耐心镇静地接受世事变迁，是最好的处事之道。

The only meaningful way to study learning is through objective measurement.

The best leaders are those who create more leaders, not more followers.

"The truth is not always the most important thing; sometimes, what matters is what people believe to be true."

通过高层次的战略规划，能够实现持续有效的变革。