告子下 · 第 13 / 16 章 · 孟子 6B.13
《孟子·告子下》6B.13：好善足以治天下
孟子说治国第一资质不是强、知、多闻，而是好善：只要真正爱善，四方之人就愿意带着好意见来；不好善，则只剩谄谀。
鲁欲使乐正子为政。孟子曰：「吾闻之，喜而不寐。」公孙丑曰：「乐正子强乎？」曰：「否。」「有知虑乎？」曰：「否。」「多闻识乎？」曰：「否。」「然则奚为喜而不寐。」曰：「其为人也好善。」「好善足乎？」曰：「好善优于天下，而况鲁国乎？夫茍好善，则四海之内，皆将轻千里而来告之以善。夫茍不好善，则人将曰：『訑訑，予既已知之矣。』訑訑之声音颜色，距人于千里之外。士止于千里之外，则谗谄面谀之人至矣。与谗谄面谀之人居，国欲治，可得乎？」
英文参考译文
The prince of Lu wanting to commit the administration of his government to the disciple Yue Zheng, Mencius said, 'When I heard of it, I was so glad that I could not sleep.' Gong Sun Chou asked, 'Is Yue Zheng a man of vigour?' and was answered, 'No.' 'Is he wise in council?' 'No.' 'Is he possessed of much information?' 'No.' 'What then made you so glad that you could not sleep?' 'He is a man who loves what is good.' 'Is the love of what is good sufficient?' 'The love of what is good is more than a sufficient qualification for the government of the kingdom; how much more is it so for the State of Lu! If a minister love what is good, all within the four seas will count 1000 li but a small distance, and will come and lay their good thoughts before him. If he do not love what is good, men will say, "How self-conceited he looks? He is saying to himself, I know it." The language and looks of that self-conceit will keep men off at a distance of 1,000 li. When good men stop 1,000 li off, calumniators, flatterers, and sycophants will make their appearance. When a minister lives among calumniators, flatterers, and sycophants, though he may wish the State to be well governed, is it possible for it to be so?'
重点修订页
人工补强的解释层
核心问题
为什么孟子说“好善”就足以治天下？
直接回答
因为治理首先败坏的，常不是执行能力，而是输入能力。掌权者若真好善，贤者还会愿意来讲真话；若不好善，最先被赶走的就是好意见。
第一性原理
一个系统是否还能被教、被纠偏，往往取决于权力是否欢迎比自己更好的东西进入。
为什么重要
这章适合承接“好善”“领导与纳谏”“why loving the good matters in government”这类搜索，是孟子关于治理输入端的经典判断。
延伸阅读
这章在做什么
这章是《告子下》第 13 / 16 章，最直接的进入线索是“吾闻之，喜而不寐”。放回全卷，它讨论的是养心、判断与人格形成，并可与仁政互相印证。
更宽的搜索入口
如果你带着更宽的问题进入这一章，先从正确的 hub 页进入
全卷语境
《告子下》把养心、判断和人格形成连成一条修身路线。
关联主题
引用提示
不要把“好善”读成空泛的好脾气。孟子的证明是制度性的：有没有人还愿意轻千里而来，以善告之。