When one reads the Qur'an, wisdom settles in him and he becomes completely reasonable and rational. The Qur'an is the book of reason. It is a light that causes wisdom to settle in the brain. Normally wisdom is not formed in one's brain, only intelligence. When the human brain comes into contact with the Qur'an, wisdom and reason settles in. Otherwise, wisdom cannot possibly be attained, only intelligence can. - Harun Yahya