Imagination is the key to understanding the world.

可持续发展不是一种选择，而是我们对后代的责任。

Trust is the expectation that arises within a community of regular, honest, and cooperative behavior, based on commonly shared norms, on the part of other members of that community.

"The writer's duty is to tell the truth, even when it is uncomfortable."

穷人通过减少欲望而变得富有。