A person may cause evil to others not only by his actions but by his inaction， and in either case， he is justly accountable to them for the injury.

The act of writing is an act of hope, a belief that someone will listen.

没有自然光的房间不是真正的房间。

"To write is to wage war against forgetting."

The best way to predict the future is to invent it.

可持续性不是一种选择，而是长期成功的必要条件。

在变革的时代，学习者将继承地球，而那些博学的人会发现自己装备精良，却要面对一个不复存在的世界。