The Quran and hadith are considered two of the principal sources of religious knowledge; these two, named religious narrative sources in this paper, frequently address man, and underlining the material and spiritual needs of man, provide instructions for the happiness man in this world and the Hereafter. Comparison of Islam and its narrative sources, including the Qur'an and sunnah, suggest that Islam is a social religion and does not merely aim at the happiness of man in the Hereafter. The Holy Quran underscores the basic human needs which include sound belief, admirable morality and desirable practice and teaches their general principles. It has been left to the sunnah of the Infallibles to offer the details and explication of these general principles which are related to human needs in some way. These teachings cannot be understood without being cognizant of various aspects of the comprehensiveness of the two aforementioned sources. This paper, first, reviews the comprehensiveness of the Holy Quran – which is considered an important basis in interpretation of the Quran – using traditions and, then, enumerates some examples of human needs relying on the inspiration from traditions as a comprehensive religious source and, finally, concludes that the comprehensiveness and extensiveness of narrative sources in meeting the needs of Muslims and none-Muslims is indisputable.