在梭罗著名的《瓦尔登湖》里,给人留下深刻印象的是梭罗的几句话:我的屋子里有三张椅子,独坐时用一张,交友用两张,社交用三张。因为,“人只有一个半朋友”,一个肝胆相照的,半个能为朋友牺牲自己利益的, 所以交友只需两张椅子,一张给朋友,一张给自己;社交需要三张椅子,留一张自己坐, 一张给增长的知识,一张给促膝而谈的乐 In Thoreau's famous “Walden”, what impresses is Thoreau's few words: There are three chairs in my house, one for one, two for friends, three for social use Zhang Because “people have only one and a half friends,” a half-hearted friend can sacrifice his own interests, so only two chairs for friends, one for friends and one for yourself; social need three chairs, leaving one Zhang himself sitting, a piece of knowledge to growth, a knee-jerk music