just find quote that motivate

The popular view of a real entrepreneur is someone with a big vision, and a stubborn determination to charge straight ahead through any obstacle and make it happen. The vision part is fine, but successful entrepreneurs have found that the extreme uncertainty of a new product or service usually requires many course corrections, or “pivots” to find a successful formula.http://www.forbes.com/sites/martinzwilling/2011/09/16/top-10-ways-entrepreneurs-pivot-a-lean-startup/