Presume a situation that you are going alone by your car for a long trip. During the journey, suddenly the car stopped. So you check the car for the reason and find out there is no fuel. Then you saw a fuel station nearby, but it is an older one. But there is no sign for fuel. Based on your instinct, you felt there could be fuel somewhere. So you started searching for it. This task could be accomplished only if you have the attitude of never giving up. Obviously you will find it out as you are a person of that kind.