55. The commentators differ in the explanation of this verse, One group says that the address here is directed to the people who believed in the Prophet Jesus (peace be upon him). It is being said to them: Believe in the Prophet Muhammad (peace be upon him) now; for this you will be given a double reward, one reward for believing in the Prophet Jesus (peace be upon him) and the other reward for believing in the Prophet Muhammad (peace be upon him). The second group says that the followers of the Prophet Muhammad (peace be upon him) are being addressed. They are being admonished to the effect: Do not rest content with your verbal affirmation of the faith only, but you should believe sincerely and truly. For this you will be given a double reward: one reward for giving up disbelief and turning to Islam, and the second reward for believing sincerely in Islam and remaining steadfast to it. The first commentary is supported by (verses 52-54 of Surah Al-Qasas), and furthermore by the tradition reported by Abu Musa al-Ashari, according to which the Prophet (peace be upon him) said: There are three men who will get a double reward, one of them is a person from among the followers of the earlier Books who believed in this earlier Prophet and then believed in the Prophet Muhammad (peace be upon him). (Bukhari Muslim). The second commentary is supported by( verse 37 of Surah Saba), which says that the righteous believers will have a double reward. From the point of view of argument both the commentaries are equally weighty. However, considering the theme that follows, one feels that the second commentary is more in keeping with the context here; and in fact the whole theme of this Surah, from beginning to end, supports this very commentary. From the beginning of this Surah the addressees are the people who had entered Islam after affirming the Prophethood of the Prophet (peace be upon him) and it is they whom the Surah invites to believe sincerely and truly and not merely verbally with the tongue.
56. That is, He will bless you with such a light of knowledge and vision in the world by which you will be able clearly distinguish at every step the straight way of Islam from the crooked paths of ignorance in different matters of life, and in the Hereafter He will grant you the light that has been mentioned in verse 12 above.
57. That is, He will forgive you your errors that you may happen to commit due to human weaknesses in spite of your sincere efforts to fulfill the demands of the faith, and will also forgive those sins of yours that you had committed in the pre-Islamic days of ignorance.