推荐回答（2个）
李维斯是牛仔品牌李维斯的创立者。
原籍德国的青年李维斯在还没有成功之前也是一无所有的，想要成功的梦想激励着他，驱使他加入到了西部大淘金的人群中。可是在他出发没多久，一条宽阔的河流就挡住了他的去路，还没有开始淘金，如此大的困难就阻碍了他，让他万分沮丧。可是在沮丧之余，他想起了幼年时爷爷告诉过他的一句话：“真是太棒了！这样的事情竟然发生在我的身上！又给了我一次成长的机会！凡事必有因果，必有利于我！”当他念着这句话时，心里就充满了激动与自信，果然阻力变成了动力。他发现并不只是他一个人遇到这样的困难，很多去淘金的年轻人都被大河给拦住了去路，因此他想到如果我在这里做个皮筏，然后专门载人过河，不是一个很不错的生财之道吗？他想到了就立刻去做，开始在这条河上做起了摆渡的生意。生意果然不错，很多年轻人都通过他的帮助渡过了大河。
但过了几年之后，政府在附近建了一座桥，李维斯的生意没有了，他只好继续踏上淘金之路。来到了淘金的地方，他用摆渡赚到的钱买了些工具，支起了帐篷，开始了他的淘金生涯。可是没过多久，厄运又降临到了他的身上，当地的恶人砸了他的帐篷，没收了他的淘金工具，说是没有交保护费。
此时的李维斯又想起了他爷爷对他说的那句话，于是他的自信心又增加了。这时，奇迹又发生了。李维斯发现，在当地淘金的年轻人和牛仔们穿的裤子都非常容易破，他们因此很苦恼。李维斯又发现路上遗弃着很多的帐篷，他就把这些帐篷的面料拆卸下来，缝制成了几条裤子，结果被当地淘金者们高价抢购。李维斯做的裤子由于非常耐磨，很实用，因此广受当地牛仔和淘金者的欢迎。李维斯接着向帆布商订购大量帆布，请了服装厂按他的设计缝制成服装。这些大批生产的帆布服装还增设了几个口袋，便于淘金者放些锤子、钳子等工具和存放金矿石。李维斯就此打开了销路，随即又成立了李维斯公司，全球第一的牛仔品牌就这样诞生了。
在接二连三的打击下，如果李维斯没有自信，就此倒了下去，那么全球第一的牛仔品牌也就不可能产生。
对于推销员来说，自信显得尤为重要。因为推销员遭到的拒绝与失败比其他行业的人多得多。但是推销员只要拥有了自信，一方面能使得他坚定战胜挫折的决心，另一方面又能给客户一个良好的印象，一位充满自信的推销员会深受每一位客户的欢迎，因为销售是信心的传递，是情绪的转移。客户从推销员身上看到了自信，那么他们自己也就会变得自信。
——引自延边人民出版社《细节决定成交》
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