"History is not just facts and dates; it’s the lives of people who lived them."

Every challenge is an opportunity to learn and grow.

可持续性不是选择，而是我们对后代的责任。

The mind， both in so far as it understands， and in so far as it imagines， is passive.

最好的书……是那些告诉你你已经知道的事情的书。