A lot of entrepreneurs run on faith -- faith in their idea. There is no room for faith when practicing continuous innovation.

Most entrepreneurs tend to be optimists. They build their own reality distortion fields as a survival tactic. Reality eventually catches up. It is less wasteful to embrace reality upfront.

What separates successful entrepreneurs from others is that they manage to iterate from their Plan A to a plan that works before running out of resources. They do so, not by holding on to the same idea on faith that it will prevail, but rather by systematically and ruthlessly testing their models and plans using small and fast experiments that stress tests their riskiest assumptions and overcome constraints.