Imam undertook serious and very useful discussions in this regard in his famous book of “an exposition on Forty Hadith” and explains as following:
He does not need our worship, our service or our obedience.
Any disobedience, polytheism and two-facedness on our part will not cause any harm to His Empire, but as He is the Most Merciful of the merciful—, His boundless mercy and compassion, and His perfect wisdom require of us the pursuance of the right path, and for this purpose He made clear the difference between good and evil, beautiful and ugly to us and warned us of the perils and hazards to be met on the road of human perfection and the path of true felicity.
We are indebted to God Almighty for this great guidance and we have to show, with all humility, great respect towards Him in our worships, our devotion and our supplications, whose importance we cannot comprehend unless we gain another-worldly vision.
As long as we sojourn in this narrow physical world, confined to the limits of the sequence of time and shackles of space, we cannot comprehend the infiniteness of the realm of His power, and we cannot even thank Him in our prayers and supplications for His guidance.
Lo! Allah is independent of (all) creatures. (3:97)