Personal crisis: Questioning man's intelligence and his ability to use it. The fundamental principles regarding experience that are given to us by the humble nature, are our unlimited ability to understand and think. That is what differentiates us from being mere creatures of nature. For the outside world, therefore, the world of experience is the same source of stimuli for all of us. The thing that makes us all so different from one another despite all living in the same world and receiving the same information, is our unique and different ability to comprehend the world. As it was mentioned above, the intellectual power of man is unlimited, but it depends on how much of his cognitive abilities is one willing to use. For example, for the common understanding the fact that the equatorial circumference of the earth is around 40.075 km, (a fact that doesn’t have to be remembered by everyone of us as it is easily accessible whenever we need it) makes believe that the world