在理解宇宙的追求中，我们必须保持谦逊，因为我们找到的每一个答案都会引出一系列新的问题。

出自汉·桓宽《盐铁论·疾贪》。欲，想。表，仪表，这句话指身体。下，指下属。先之身，先要求自己。要想影子正，就要先把自己的身子站直；要想下属清廉，自己要先做出表率。这句话以正影先正身为喻，说明正人先正己的道理。

I think it would be a disaster. The extraterrestrials would probably be far in advance of us. The history of advanced races meeting more primitive people on this planet is not very happy, and they were the same species. I think we should keep our heads low.

The true genius shudders at incompleteness — and usually prefers silence to saying something which is not everything it ought to be.