A man should keep his little brain attic stocked with all the furniture that he is likely to use, and the rest he can put away in the lumber room of his library, where he can get it if he wants it.
——Doyle Arthur Conan British writer
一个人的大脑里应该有一个小阁楼，用来储存他平时要用的知识；他可以把余下的知识储存在他的图书贮藏室里，以备需要时备用。
——英国作家 柯南 道尔