ভূমিকা
"Verily Allah does not forgive that (anything) be associated with Him, but He forgives less than that to whom He pleases; and whoever associates anything with Allah, has gone astray into far error." Polytheism is an earnest deep disease. Therefore as long as it has not been rooted out in a person, morals and righteous deeds are not spiritually of avail. Repentance is the remedy of polytheism.
So, a polytheist should come out of the circle of paganism in order to be involved in the forgiveness and Mercy of Allah. The ways toward the forgiveness of Allah are: repentance, pardon, good deed, and avoidance of committing great sins.
"They (the pagans) invoke in His stead but female things (the Idols), and they invoke none but Satan, the persistent rebel." The previous verse considered the polytheists being in aberration. The reason of it is referred to in the above verse. The pagans of Mecca used to worship some angels whom they called the daughters of God. That idea was a wrong and deluded thought.
"Allah has cursed him (Satan)..." Satan is the early enemy of man, and it is for this reason that Satan does his utmost possible effort to mislead him. Then, we must be completely aware not to fall into his trap.