出自汉·桓宽《盐铁论·刺义》。品德高尚的人不拒绝听取负薪之人的意见，其名声才能远播。所以见多识广的人知识广博，多听多闻的人拥有智慧，拒绝别人劝说的人心胸狭隘，一味相信自己的人必然孤立。

And I urge you to please notice when you are happy, and exclaim or murmur or think at some point, 'If this isn't nice, I don't know what is.'

We are just an advanced breed of monkeys on a minor planet of a very average star. But we can understand the Universe. That makes us something very special.

I'm the type of person that if you ask me a question and I don't know the answer, I'm gonna tell you that I don't know. But I bet you what, I know how to find the answer and I will find the answer.

The only limit to our realization of tomorrow will be our doubts of today.