“There has come to you a Light from Allah, and a Manifest Book” (Qur’an 5:15).
in which the word Light has been explained by a number of classic Qur’anic exegetes as follows:
(Jalal al-Din al-Suyuti:) “It is the Prophet (Allah bless him and give him peace)” (Tafsir al-Jalalayn, 139).
(Ibn Jarir al-Tabari:) “By Light He means Muhammad (Allah bless him and give him peace), through whom Allah has illuminated the truth, manifested Islam, and obliterated polytheism; since he is a light for whoever seeks illumination from him, which makes plain the truth” (Jami‘ al-bayan, 6.161).
(Fakhr al-Razi:) “There are various positions about it, the first being that the Light is Muhammad, and the Book is the Qur’an ” (al-Tafsir al-kabir, 11:194).
(al-Baghawi:) “It means Muhammad (Allah bless him and give him peace), or, according to a weaker position, Islam” (Ma‘alam al-Tanzil, 2.228).
And Qurtubi (Ahkam al-Qur’an , 6.118) and Mawardi (al-Nukat wa al-‘uyun, 2.22) mention that interpreting Nur as “Muhammad” (Allah bless him and give him peace) was also the position by [the Imam of Arabic grammar Ibrahim ibn Muhammad] al-Zajjaj (d. 311/923).
All of which shows that the Prophet (Allah bless him and give him peace), is a light from Allah, according to the Qur’an . This is the interpretation of the earliest exegetes, for al-Tabari was the sheikh of the salaf (early Muslims) in tafsir; while explaining Nur as “Islam” is an interpretation that came later.
As for the Prophet (Allah bless him and give him peace) being a bashar or ‘human being’, there is no doubt of this, because it is Qur’an and ‘aqida. Yet the Qur’an does not simply state that he is a human being, but rather says,
“Say: I am but a man like you who is divinely inspired that your god is but One God” (Qur’an 18:10)
The important qualificatory phrase in this verse shows us that the Prophet (Allah bless him and give him peace) was a completely different sort of human being from anyone else, then or now. For none of us can say he is divinely inspired as the Messenger of Allah (Allah bless him and give him peace) was. Rather, as is said in a poetic ode to the Prophet (Allah bless him and give him peace) which is often sung at gatherings after singing the Qasida al-Burda [Ode of the Prophetic Mantle] by al-Busayri:
Muhammad is a human being, but not like humankind;
He is a ruby, while people are as stones.