Needless to say religious thought, like other forms of thought, must have reliable sources from which the raw material of its thought originates and upon which it depends. Similarly, the process of reasoning necessary for the solution of mathematical problems must have a series of established mathematical facts and principles. The single source upon which the divinely revealed religion of Islam depends and upon which it is based, inasmuch as it is based on a revelation of celestial origin, is none other than the Holy Quran. It is the Quran which is the definitive testament of the universal and ever-living prophethood of the Prophet and it is the content of the Quran that bears the substance of the Islamic call. Of course the fact that the Quran is alone the source of Islamic religious thought does not eliminate other sources and origins of correct thinking, as will be explained later.
There are three methods of religious thought in Islam. The Holy Quran in its teachings points to three paths for Muslims to follow in order to comprehend the purposes of religion and the Islamic sciences: (1) the path of the external and formal aspect of religion (the Shari’ah); (2) the path of intellectual understanding; and (3) the path of spiritual comprehension achieved through sincerity (ikhlas) in obeying God. It can be seen that the Holy Quran in its formal aspect addresses all people without providing any demonstration or proof. Rather, depending on the unique sovereignty of God, it commands people to accept the principles of faith such as divine unity, prophethood, eschatology; it gives them practical injunctions such as the daily prayers, fasting, etc.; and at the same time it prohibits them from committing certain other actions. Yet if the Quran had not provided authority for these commands it would never have expected man to accept and obey them. It must, therefore, be said that such simple utterances of the Quran are a path toward the understanding of ultimate religious ends and the comprehension of the Islamic sciences. We call such verbal expressions as "Believe in God and His Prophet" and "Perform the prayers," the external or formal aspect of religion.
In addition to guidance in the external aspect of religion, we see that the Holy Quran in many verses guides man toward intellectual understanding. It invites man to meditate, contemplate and deliberate upon the signs of God in the macrocosm and the microcosm. It explains many verities through unfettered intellectual reasoning. It must be said in truth that no sacred book praises and recommends science and intellectual knowledge for man as much as does the Quran. In many of its words and utterances the Quran attests to the validity of intellectual proof and rational demonstration, that is, it does not claim that man should first accept the validity of the Islamic sciences and then through intellectual proofs justify these sciences. Rather, with complete confidence in the truth of its own position it proclaims that man should use his intellect to discover the truth of the Islamic sciences, and only then accept this truth. He should seek the affirmation of the words contained in the Islamic message in the world of creation which is itself a truthful witness. And finally man should find the affirmation of his faith in the results of rational demonstration ; he should not have to gain faith first and the, in obedience to it, seek proofs. Thus philosophical thought is also a way whose validity and efficacy is confirmed by the Holy Quran.
Second Pilar of Islam: Salah
