The Quran is a book of divine warning. A combination of lessons and admonitions, it would be even more appropriately called a book of wisdom. The Quran does not follow the pattern of the traditional didactic book. In fact, when the average reader picks up the Quran, it appears to him to be a collection of fragmentary statements. Apparently, this feeling is not unreal. But this arrangement of the Quran is not due to any shortcoming, but is rather in conformance with the Quranic plan of retaining its original form in order to fulfill its purpose of conveying the message of truth to the reader who may, in his forays into the scriptures, read only one page, one verse or one line at a time.
One vital aspect of the Quran is that it is a reminder of the blessings granted by the Supreme Benefactor. The most important of these are the exceptional qualities with which God endowed man when He created him. Another great blessing is that He settled him on the earth, a planet where all kinds of support systems existed for his benefit. The purpose of the Quran is to ensure that, while enjoying these blessings of nature, man will keep his Benefactor in mind: he must acknowledge the munificence of his Creator. It is in so doing that man will gain entry into eternal paradise; ignoring his Benefactor, on the other hand, will lead man straight to hell. The Quran is indeed a reminder of this inescapable reality.
Source: Discovering the Quran