THE UNITY OF ALLAH:
The Being of the Almighty Allah is indeed One. it's only those that are ignorant and continue being ignorant need an evidence on how Almighty Allah is One and is really Present. those that are Allah-conscious don't desire an evidence on this subject of Tauheed and Shirk. They actually accept hook line and sinker . there's a famous proverb within the Arabic which is as follows: Al Ashyaa'u tu'rafa bi azdaadihi - "Objects are indeed understood by its opposites."
For example, peace can only be understood and appreciated by that one that has felt and experienced anxiety. That person though who has not felt anxiety, cannot appreciate peace. within the same manner, Day can't be understood if an individual has not experienced the Night. Likewise, if an individual has not comprehended misguidance how is it possible for him to know guidance? Using this very principle, we may ask, if an individual has not understood "Shirk" or Polytheism, how is it possible for him to understand or comprehend "Tauheed" or Monotheism? it's , therefore, only logical that after we've understood Shirk can we then understand Tauheed.
The Almighty Allah has actually very clearly explained the action Shirk and Tauheed, thereby completely eradicating the concept of non-religion. it's very surprising that after explaining the differences within the concept of Tauheed and Shirk so clearly, there are still doubts within the minds of these whose sole duty it's to destroy the concept or fundamentals of unity found in Islam.