"Sometimes we get sad about things and we don’t like to tell other people that we are sad about them."
书籍是最安静、最恒久的朋友；它们是最易接近、最睿智的顾问，也是最耐心的老师。
Uncertainty is not the absence of information, but the presence of too much conflicting information.
不确定性不是信息的缺失，而是过多矛盾信息的存在。