I want to liberate America from fear. I want people to be afraid of the things that are really scary, like war and famine, not their neighbor because he has a different religion.

解释：使用毒性大的药物治疗疾病时，病情十成中只能去掉六成就要停药，以免伤害正气。

指出人性中的贪婪和恶意有时比超自然现象更令人恐惧。

"Writing is a way to explore the unknown."

Psychological truth is what works in the practical world.

Every ton of low-carbon cement we produce is a step toward a healthier planet.