Al-Anam (The Cattle) Chapter 6: Verses 71, 72 (partial)
The instructions to the Prophet Muhammad (peace be upon him) are such that he has to declare in absolute clarity that God's guidance is the only guidance. As such, we are commanded to submit to the Lord of all the universe, because to Him alone all the worlds submit. Why should man be the only exception out of all creation when everything in the universe submits to God's absolute Lordship? The reference made here to the fact that God is 'the Lord of all the worlds' comes at the right time. It emphasizes an undeniable fact that all the worlds, whether known or unknown to us, submit to the laws God has set in operation and cannot break away from them. Biologically, man is also subject to the laws of nature. What he needs to do, then, is to submit also in the area in which he has been given a choice: to follow guidance or to sink in error. When man chooses to submit to God, in the same way as he does biologically, all his affairs will be set aright, because harmony will be established between his constitution and his action, between his body and his soul, between his present life and his life to come.
The most essential thing, then, is complete submission to God and the acknowledgement of His Lordship over the universe. The offering of worship and the moulding of conscious attitudes follow from this, because these cannot be done properly unless they are based on the solid foundation of man's submission to God.
"In The Shade of The Quran" - Sayyid Qutb, Vol. 5, pp. 207, 208