The greatest obstacle to being heroic is the doubt whether one may not be going to prove one's self a fool; the truest heroism is to resist the doubt, and the profoundest wisdom to know when it ought to be resisted, and when it be obeyed.

People are not lazy. They simply have impotent goals - that is, goals that do not inspire them.

人们放弃权力的最常见方式是认为他们没有权力。

"Every observation we make is a step closer to understanding the cosmos."

In the quest for understanding the cosmos, every question answered leads to a dozen more.