From a general discussion of the Holy Qur'an's essential relevance to humanity, stressing God's guidance of all His creatures toward happiness and well-being, the author proceeds to show how the Qur'an contains the fundamental roots of Islam and the proof of prophethood as the Word of God. Copious quotations from the Qur'an are given to illustrate its teachings, its exoteric and esoteric dimensions and the meaning of exegesis. The eternal validity of Qur'anic revelation is examined in depth, together with the attitudes of both Muslim and non-Muslim writers to the questions of Revelation and Prophethood. The relationship of the Qur'an to the sciences shows to what extent it encourages us to study all manner of natural and physical sciences, as well as philosophy, literature and every available branch of knowledge. The book closes with a brief description of how the Qur'an has come down to us.