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塞缪尔·斯迈尔斯：自助论·摘录 209
塞缪尔·斯迈尔斯《自助论》· Self-Help · 领导
The most profitable study is that which is conducted with a definite aim and object. By thoroughly mastering any given branch of knowledge we render it more available for use at any moment. Hence it is not enough merely to have books, or to know where to read for information as we want it. Practical wisdom, for the purposes of life, must be carried about with us, and be ready for use at call. It is not sufficient that we have a fund laid up at home, but not a farthing in the pocket: we must carry about with us a store of the current coin of knowledge ready for exchange on all occasions, else we are comparatively helpless when the opportunity for using it occurs.
出处：
https://www.gutenberg.org/ebooks/935
定位：Excerpt 209 · 核对日期：2026-10-19 · 核验：短摘录
白话
最有收获的学习，是带着明确目标去学。彻底掌握某一门知识，就能随时拿来用。所以光有书、光知道去哪儿查资料还不够。过日子的实用智慧得带在身上，随时能拿出来用。就像家里存着钱、口袋里却一个铜板也没有，那不行；我们得随身带着知识这种“流通货币”，随时能交换，否则机会来了也只能干瞪眼。
上下文
斯迈尔斯《自助》中论知识的实用化，强调学习要有目标并内化为随时可用的能力，而非仅囤积书本。
今日一问
你学过的哪样东西，是能随时拿出来用的，而不是只记在笔记本里？
公版作品；原文逐字取自 Project Gutenberg，仅摘录段落并附全书链接。
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