Surah Ikhlas (112)
1. Say: He is God, The One
2. God, the eternal, absolute
3. He begets not, nor is he begotten
4. And there is none like unto him.
God is one, indivisible unique. God is the creator, all else is the created. God is independent of his creation but all creation is dependent on him.
God does not "need" or "want". God will exist regardless of what we do or do not do. So what is the purpose of Guidance?
Guidance is given to people because God is compassionate and merciful and gives us warning of Judgement day so that we can choose the path that is right and avoid the path that is wrong.