“When I find what seems to be the right course I always wish to keep it. There may be another way to success, even to greater success. But the chances are against it. The ways to great success in any line are not numerous. When a certain method has proved itself profitable I hesitate to drop it, until I have found and proved a better method by some local tests. The best way found to sell a product to thousands is probably the best way to sell other thousands.”