As long as a person aspires to the existence of a goal or to reach a goal, then he is a belief, of course. Belief is the result of aspiration, and aspiration is the result of contemplation, as it cannot be said that contemplation arises without a basis. Contemplation cannot arise except from a belief or for the sake of adopting a belief. A person may begin by imitating his parents without realizing the facts of the matters and beliefs that they follow. However, when he grows up and contemplates the facts of existence, contemplation reveals to him what was hidden to him if he was of the mind, and the desire to search is born in him. Regarding the evidence of proof and denial, if doubt comes over him about the nature of something he believes, and a hidden or apparent conflict arises between his mind and his belief, he begins reviewing the principles on which his belief is based in order to find results supported by certainty.