If a Nation expects to be ignorant and free in a state of civilization,it expects what never was and never will be....If we are to guard against ignorance and remain free,it is the responsibility of every American to be informed."

An empire founded by war has to maintain itself by war.

Faith in a holy cause is to a considerable extent a substitute for the lost faith in ourselves.

科学家研究自然并非因为它有用；他研究它是因为他从中获得乐趣，而他从中获得乐趣是因为它是美丽的。

Every existing situation has the potential to become more.

农业创新需要我们在尊重自然平衡的同时跳出常规思维。