A fisherman was fishing. He has a rod in his right hand, and a twenty five centimeter-long ruler in left. Whenever he hooked a fish, he measured the length of the fish. If a fish was longer than the ruler, he threw it away; shorter, put the fish into a container.
There was a man beside the fisherman, looking at the sight. The man asked the fisherman why he was doing so. Then the fisherman replied, "The pan in my house is 25 centimeters long. I can't roast a fish if it is longer than the pan."
The ruler restricted his thinking to twenty five centimeters. When something great and an epoch-making idea comes to your mind, what do you decide to do? You may say, "It is too much for me. It's beyond my capability."
Please keep in mind. Because of your timidity, you would lose the opportunity that is bigger and greater than the length of your thinking.