出自汉·桓宽《盐铁论·通有第三》这句话给了那些投机者很大的信心，他们会说：你看，老祖宗都说想要富你得靠脑子，凭力气是赚不到大钱的，想要得利你还得住在一个靠近市集的地方，当然，我也很是承认他说的对，脑子好使，又有一个地段很好的底商，怎么会不赚钱呢？其实你要仔细想一下，这就是一句废话，你有个好地段的底商，就是租出去，自己什么也不干，也有钱拿的！这个条件，我们大部分人都是没有的！意思是创造财富在于方法，不一定要靠体力获得。获取利百润的关键在于审时度势发现商机，不一定要亲自耕种获得。

Society can and does execute its own mandates， and if it issues wrong mandates instead of right， or any mandates at all in things with which it ought not to meddle， it practices a social tyranny more formidable than many kinds of political oppression， since， though not usually upheld by such extreme penalties， it leaves fewer means of escape， penetrating much more deeply into the details of life， and enslaving the soul itself.

进步的关键在于坚持和好奇心。