The theoretical foundation of Islam is summarized in one statement reported by Prophet Mohammad (PBUH). He said, “Islam is constructed upon five tenants”:

Æ Believe that Allah is the only God and that Mohammad is his Messenger.

Æ Establish prayer.

Æ Pay the Zakah dues.

Æ Fast the month of Ramadan.

Æ Perform pilgrimage to the Sacred House in Mecca.

The first of these tenants provides the intellectual foundation of the ideology of Islam. It is the base upon which everything else in Islam is constructed. Furthermore, it provides what is called an intellectual leadership, because once this foundation is established, the human behavior is naturally molded by whatever laws that emanates from this foundation.

Islam requires the belief in the existence of god to be based upon a mental reasoning process. In this regard, Islam devalues any type of belief if it is a mere imitation and continuation of the beliefs of older generation. In numerous occasions, the Quran belittles the beliefs of people which simply rely on the beliefs of fathers and previous generations. In Surah Al-Maidah (chapter 5, verse 104), it says, “And when it is said to them: Come to what Allah has revealed and unto the Messenger. They say: Enough for us is that which we found our fathers following, even though their fathers had no knowledge whatsoever and no guidance.” This notion is repeated in other places in the Quran; see for example the verses in references.161, 162, and 163

Instead of following a belief that has been simply inherited from older generation without careful scrutiny, the Quran invites the people to ponder and use their minds to establish a firm belief in the existence of one Almighty Creator. In Surah Al-Ghashiah (chapter 88, verse 17-20), the Quran says, “Do they not look at the camels, how they are created? And at the heaven, how it is raised? And at the mountains, how they are rooted (and fixed firm)? And at the earth, how it is outspread?” Along these lines, the Quran makes numerous references to universal phenomena and physical realities to instigate the human thought and draw the attention to the essence of creation. See for example the direct invitation to mental reasoning in Surah Al-Baqara (chapter 2, verse 164): “Verily! In the creation of the heavens and the earth, and in the alternation of night and day, and the ships which sail through the sea with that which is of use to mankind, and the water (rain) which Allah sends down from the sky and makes the earth alive therewith after its death, and the moving (living) creatures of all kinds that He has scattered therein, and in the veering of winds and clouds which are held between the sky and the earth, are indeed proofs, evidences and signs for people who reason.” Another reference to the products of land draws the attention of the mind to ponder on the reason behind the variation in kind and quality of fruits and vegetables which grow in the same garden.164 There are more than three hundred references in the Quran to various signs, physical phenomena, and natural events which compel the mind to think and ponder about the creation, in order to establish a firm belief in the existence of the one Creator for man, life, and the universe.165