Enlightenment thinkers first brought up the two discriminative concepts of natural religions and positive religions to distinguish the inevitability from contingency, the rational from the irrational of Christianity; and differentiate the divine truths accepted by the humanities from the theology admitted by the Church. But to the author's opinion, concerning the relationship between God and human beings, this pair of notions is not absolutely antinomic. On the contrary, they can comprise and support each other. This essay tries to expatiate from the book of Job the differences, relations and common limitations of these two notions. And it illuminates how the text of the Holy Bible elaborates the relationship between human beings and God and how it overcomes the two notions of natural religions and positive religions.