Knowledge is in fact of two types: revealed and established. The former reached man through the prophets, while the latter was established as such by means of research and experiments carried out by human beings. Neither of these two types of knowledge indicates that there is any being worthy of worship except the one and only God. When neither supports the concept of polytheism, how can a polytheistic credo be appropriate for man? One who seeks the support of any thing or any being other than God, will find himself abandoned by that thing or being in the Hereafter.