21. Even though the message of the Qur'an is addressed to all, benefiting from it depends on ones willingness and on God's succour in relation to that willingness. This is why the Qur'an first explained which kind of people can and which kind of people cannot benefit from the Qur'an. As this has been explained in the foregoing verses, the quintessence of the message to which the Qur'an invites all mankind is now put forth.
22. So that you are saved from false beliefs and unrighteous conduct in this life, and from the punishment of God in the Next.
23. That is, when man recognizes that all those things were done by none
but God, then worship, devotion and service must be exclusively for Him. For
who besides the Creator can legitimately claim these things from man?
Not to set up others as rivals to Allah means not to make anyone other than
God the object of worship, service and obedience that one owes to God alone.
Later on we shall see, in some detail, how the Qur'an itself specifies the forms
of worship and service which we owe exclusively to God, and wherein associating
anyone else amounts to shirk (associating others with God in His divinity).
This, the Qur'an seeks to eradicate.