In a Q & A session in India a young boy of six or seven years of age asked this question. Here is how I responded.
Isaiah 43:7 indicates that man was created for the glory of God. But, it seems to me, that this has reference to our purpose, and our role. We each are to live a life that brings glory to God (see 1 Cor. 6:20; 1 Cor. 10:31; Matt. 5:16).
None of us really add glory (beauty) or honor (weight) to His essence. He needs nothing from man. He doesn’t need food, shelter, or clothing from man. He is self-sufficient. Read 2 Sam. 7; 1 Chr. 17; Acts 7:47-50; and Acts 17:22-25. Look especially at these words, “God that made the world and all things therein, seeing that he is Lord of heaven and earth, dwelleth not in temples made with hands; neither is he worshipped with men’s hands, as though he needed anything (emp. Mine), seeing he giveth to all life, breath, and all things” (Acts 17:24-25).
So, while man is to live in such a way that glorify God and causes others to glorify him as well, we do not add anything to His essence. God needs nothing from man. Man needs God. God does not depend on man. Man depends upon God, “…by him all things consist” (Col. 1:17b).
However, having said this, he does receive joy and pleasure from man. Read Psalm 149:4; Luke 15:7, 10; 2 Cor. 2:15; Phil. 4:18. It is clear that we were created “for him” (Col. `1:16). It appears to me that he desired to spend eternity with us (see Matt. 25:34; John 17:24).
Far from being a harsh God that enjoys destroying man; Far from being a sadist; he has “no pleasure in the death of the wicked” (Ezek. 33:11). He prepared a wonderful place for us (Matt. 25:43; John 14:1-3). He wants us to be where he is (John 14:3).