Zoheir Ali Esmail, Shaykh Zoheir Ali Esmail has a Bsc in Accounting and Finance from the LSE in London, and an MA in Islamic Studies from Middlesex University. He studied Arabic at Damascus University and holds a PhD... Answered 3 months ago

Bismillah

Thank you for your question. The reason for why God cannot have parts is that it would mean that He would be needy of a part to bring about the whole. Just like water cannot be water without one of its constituent elements and is therefore in need for each element in the right mix. However, God is not in need of anything to exist, rather his existence is so intense that it is necessary.
 

This whole hypothetical scenario in which we consider God having parts fundamentally goes against His Oneness, where His Oneness does not mean numerical oneness, but that He is completely limitless. In order to even think of parts we have to first posit limits in order to distinguish one part from another or in order to conceive of a single part at all. That itself is not possible for the an unlimited being as it renders Him limited.

May you always be successful