be a minor sin expiated by avoiding major sins. It may also be forgiven through repentance or good deeds that erase evil deeds, or expiated through worldly afflictions and the like. Nevertheless, the religion of Allah, for which He revealed His Books and sent His messengers, is what was explained above: seeking Allah alone through righteous deeds.

This is Islam in its comprehensive sense, besides which Allah accepts no religion from anyone. Allah Most High says:

“Whoever seeks a religion other than Islam, it will never be accepted from him, and in the Hereafter he will be among the losers.”
Surah Āl ʿImrān 85

Allah Most High also says:

“Allah bears witness that there is no deity except Him, as do the angels and those endowed with knowledge. He upholds justice. There is no deity except Him, the Almighty, the All-Wise. Indeed, the religion with Allah is Islam.”
Surah Āl ʿImrān 18–19

Islam encompasses two meanings. The first is submission and obedience, so that one is not arrogant. The second is exclusive devotion, as expressed in His words:

“And a man belonging exclusively to one man.”
Surah al-Zumar 29

Thus, one must not be shared between masters. It means submitting