Surah 16. An-Nahl, Ayah 101

I.e., they do not understand the necessity of a new dispensation and, therefore, do not really understand the Qur'an.

I.e., by substituting the message of the Qur'an for the earlier dispensations - and not, as some Muslim scholars maintain, "abrogating" one Qur'anic verse and replacing it by another. (Regarding the untenable "doctrine of abrogation", in the latter sense, see {2: 106} and the corresponding note [87]; see also note [35] on {41: 42}.)

I.e., the gradualness of revelation (implied in the verbal form yunazzil) corresponds to God's plan, according to which He has gradually unfolded His will to man, substituting one dispensation for another in the measure of mankind's intellectual and social development, bringing it to its culmination in the message of the Qur'an.

 See footnote for 2:106.

See ii. 106, and n. 107. The doctrine of progressive revelation from age to age and time to time does not mean that Allah's fundamental Law changes. It is not fair to charge a Prophet of Allah with forgery because the Message as revealed to him is in a different form from that revealed before, when the core of the Truth is the same, for it comes from Allah.