It has expounded...
It has expounded, in the most eloquent fashion, truths of a metaphysical nature together with everything that touches, however slightly, on the happiness of wretchedness of the human being. Although those who are not acquainted with the Arabic language cannot fully appreciate its miraculousness, they can perceive the miraculous nature of the meanings and truths it contains.
The limitation in time of the miracles performed by the earlier Prophets was an indication of the impermanence of their religions and the laws that they brought. By contrast, the miracle attesting to the prophethood of the Prophet of Islam cannot be temporally limited, because his message is universal and represents the culmination of all preceding religions; his prophethood requires an eternal miracle, a brilliant and eloquent proof of its immortality.
A permanent message must display to mankind a permanent and everlasting miracle, one which advances with time, so that just as it offered convincing proof to people of the past, it may do the same to people of the future. A short-lived miracle that is imperceptible to later generations cannot be a source of reference or judgment for the future. For this reason, the Qur’an is presented as a permanent and everlasting miracle, the final manifestation of God's revelation.
The Qur’an itself says: "The true and well-formulated message of your Lord has now been completed, and none is able to change it." (6:115) From the very first day when he presented his religion as a universal school of thought, the influence of which was not to be contained by geographical or ethnic boundaries, the Prophet of Islam displayed this proof of his messengerhood to the whole of mankind, as a living proof that his mission and the revolutionary movement he inaugurated represented the final chapter in the history of prophetic missions and movements.
The Qur’an does not represent an ideological weapon for temporary use in moving from an inferior social system to a superior one at a given stage in history; it represents the permanent ideology of the human being living in the social and intellectual order of Islam. The miracle accompanying the mission of the beloved Prophet of Islam brings to an end all the previous messages, limited as they were to a certain time.