Interview of Grand Ayatollat Saanei.
Question: what is your attitude in general towards non-Muslims?
Are their good deeds acceptable by God?
Answer: I am of the opinion that the outcome of good deeds and eschewing evils according to one’s understanding will be paradise. Regardless of the religion they practice, owing to the fact that they are convinced by the righteousness of their ideology without the slightest doubt, they get what they deserve. God says: ‘Good deeds will be rewarded ten times as much as they deserve, and evildoers will be given punishment which fits the evil; You shall not be unfairly treated.’
According to Molla-Sadra, paradise inevitably evolves from spiritual development.
In some Quranic verses, faith is a vital prerequisite for paradise, which I interpret it, as sincere belief in the goodness of one’s deeds not belief in God. Strong belief is associated with the mental serenity, and it contributes to spiritual development. However, someone with a sense of being under compulsion can never be consistent in doing good deeds and improve.
Neither identification nor label, i. e. Christian, Muslim, or Buddhist is the requirement for paradise, but indeed good deeds are. An agnostic involved in his skepticism can not believe in God or prophet. Neither do Christians put trust in Prophet Mohammad. It would be utterly inconceivable if God called for a particular identification on the Doomsday. Would it be unfair?
Quran says reassuringly: “God shall not be unfair to any of his creatures.”
Similarly, evil doing mortifies human soul, which will result in hell. It makes no difference which religion or belief you have, but which deeds you perform. If doubt is cast upon the authenticity of his ideology, one has to seek the truth; other wise he is guilty of laxity.