Question: God needs man or man needs God? A very clear contradiction exists between verses 51:56 and 35:15. While the former verse says that God created Jinns and mankind for His own reasons (read also 67:2), the latter one says it is man who is in need of God! Read also 51:57.
(51:56) "I have only created Jinns and men, that they may serve me" * (67:2) "He who created Death and Life, that He may try which of you is the best in deed"
35:15 "O mankind! It is you that have need of God: but God is the One Free of all wants, worthy of all praise.
Answer: We need God and God wants us. Our need for God is spiritual, materialistic and we need him for guidance. He wants us to be his worshipers and to meet his expectations. He has no material need from us. We are the most to gain from the realtionship: our happiness in life and afterlife. Actually 35:15 God described us as poors and he as rich in Arabic words.
35:15 O ye men! It is ye that have need of Allah. but Allah is the One Free of all wants, worthy of all praise.
يَا أَيُّهَا النَّاسُ أَنتُمُ الْفُقَرَاء إِلَى اللَّهِ وَاللَّهُ هُوَ الْغَنِيُّ الْحَمِيدُ