The author of the present work has preformed a tremendously valuable service, by assembling a vast array of experts from traditional Islamic commentaries. The reader will notice that the verse containing the call to the believers is frequently accompanied by several others preceding and/or following the call. Numerous other verses are also quoted and discussed so that Quranic verses are treated in the course of the whole work, but the main emphasis being on the verse that contain the address : “o you who truly believe”.