"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.)"