[^2] Another Qur'anic verse says: اَلَمْ تَرَ اِلَي الَّذِيْنَ بَدَّلُوْا نِعْمَتَ الله کُفْرًا وَّ اَحَلُّوْا قَوْمَہُمْ دَارَ الْبَوَارِ جَہَنَّمَ يَصْلَوْنَہَا وَ بِئْسَ الْقَرَارُ Have you not seen those people who were ungrateful to the blessing of God and caused their people to descend to the house of perdition and into hell? They will burn therein; an evil place to stay in. [^3] Have you not seen those people who were ungrateful to the blessing of God?
What was the blessing of God that they were ungrateful for? It was the blessing of divine power that is a manifestation of the Lord's power - the powers of religion, the blessing of the management of a person's affairs; blessing of controlling the man's abundant capabilities, intellect and powers. These are all blessings and assets that can be a source of good for the man.
Every person who lives under the rule of the people who have been alluded to in this verse could have become a remarkable and noble individual and could have reached the highest levels of greatness. However, these people did not appreciate these blessings and did not benefit from them for the purpose they should have been used for. Then Qur'an says: وَّ اَحَلُّوْا قَوْمَہُمْ دَارَ الْبَوَار They hauled their followers and underlings towards hellfire and misfortune.
جَہَنَّمَ يَصْلَوْنَہَا وَ بِئْسَ الْقَرَارُ They will take them to hell where they will be thrown with faces down; and what a rotten abode it is. Imam Musa Ibn Ja’far recited this verse in front of Harun to remind him that he was the one who would haul his nation and himself to the most horrible destination and most torturous adobe. Harun asked, "Are we infidels?".
What he meant was, "did they not believe in God, the Prophet and the religion?" Imam responded with this verse to make Harun understand that an infidel is not just a person who clearly denies the existence of God or refutes Qur'an or calls the Prophet part of a fiction. It is correct that such a person is an infidel and is the best of the infidels as he makes a clear statement. Everyone recognizes him and defines his own position about this infidel clearly.
Worse than the infidel is a person who is ungrateful for the great blessings available to him and uses them in the wrong. Such a person pushes not only himself to hell but others under him as well. Such is the Wilayat of Satan. A person who spends his life under Satan's Wilayat, does not have control over himself.