David McConnell sold books door-to-door. Housewives were not interested in the books and frequently slammed the door in McConnell's face before he had a chance to make his sale. Instead of giving up, McConnell decided to give away a free gift, a small vial of perfume, which he made himself. He soon discovered that the women preferred the perfume to the books. He stopped selling books and created his own company Avon, which is a great success.
　　When you do nothing, you learn nothing. But when you try and fail, you learn what doesn't work. That puts you one step closer to what will work. It doesn't matter how many times you fail. It does matter that you will succeed sometime.
　　Van Gogh had failed in several careers before he began to paint. And he did succeed.
　　Success once is enough for Van Gogh.
     And the same for you—success once is enough.

　　大卫·麦克康奈尔曾经挨家挨户地卖书。家庭主妇们对他推销的书不屑一顾，经常是还没等他有机会推销产品，就当着他的面“砰”地一声关上门。麦克康奈尔没有灰心丧气。相反，他决定送一送小礼物，一种他自己做的小瓶香水。他很快就发现家庭主妇们对他的香水更感兴趣。于是乎，他不再卖书，而是改行开办了自己的香水公司：雅芳公司，结果大获成功。
　　如果你什么都不做，那么你什么都学不到。但是如果你尝试却失利了，你就知道什么路行不通，这样你就朝成功迈进了一步。你失败多少次都没有关系。重要的是你必定会成功。
　　梵·高干了好几种工作都失败了，此后他开始学绘画。他成功了。
　　对于梵·高来讲，成功一次就足够了。
　　对你同样如此：成功一次就足够了！