The testimony of the faith L¯a il¯aha illa’Ll¯ah (There is no divinity but the Divine) is a statement concerning knowledge, not sentiments or the wil… - Hossein Nasr

As a matter of fact one of the great services that Islam can render to the modern world, in which the dichotomy between reason and revelation or science and religion has reached such dangerous proportions, is to represent this possibility of the union between revelation and reason as found in the Quran. The source of revelation in Islam is the Archangel Gabriel or the Universal Intellect. Intellect (al-‘aql al-kulli in the language of hadith) and the word ‘aql itself signify etymologically both that which binds or limits the Absolute in the direction of creation and also that which binds man to the truth, to God himself. In the perspective of Islam it is precisely ‘aql which keeps man on the straight path (the sirat al-mustaqim) and prevents him from going astray. That is why so many verses of the Quran equate those who go astray with those who cannot use their intellect (as in the verses wa la ya‘qilun, ‘they do not understand’ or literally ‘use their intellect’—the verb ya‘qilun deriving from the root ‘aqala which is related to ‘aql; or the verse la yafqahun, ‘they understand not’, the verb yafqahun being related to the root faqiha which again means comprehension or knowledge.)

The Quran, like other sacred scriptures, associates knowledge and understanding with the heart, and the blindness of the heart with loss of understanding, as for example when God, after complaining of man’s not learning the appropriate lessons from earlier sacred history, asserts, “For indeed it is not the eyes that grow blind, but it is the hearts, which are within the bosoms, that grow blind” (22:46). This blindness of the heart so characteristic of fallen man is also described by the Quran as a hardening of the heart. “But their hearts were hardened, and the devil made all that they used to do seem fair unto them!” (6:43). Also, ““Woe unto those whose hearts are hardened against remembrance of Allah. Such are in plain error” (39:22). Furthermore, the Quran identifies this hardening of the heart with a veil that God has cast over the heart of those who have turned away from the truth. “We have placed upon their hearts veils, lest they should understand, and in their ears a deafness” (6:25); also, “And We place upon their hearts veils lest they should understand it, and in their ears a deafness” (17:46).

Many are aware that the Quran is concerned with religious life as well as matters related to both individual salvation and the social order, but fewer realize that the Quran is also a guide for the inner spiritual life. Paying attention to the inner meaning of the Quran results in the realization that not only does it contain teachings about creating a just social order and leading a virtuous life that results in a return to God after death in a felicitous state; it also provides the means of returning to God here and now while still in this world. The Quran is therefore also a sapiential and spiritual guide for the attainment of the truth, a guide for the attainment of beatitude even in this world.