Sound reason and critical thinking play a very important role in understanding the Qur’an and making judgement, Usul al-Fiqh enables scholars to deduce with a reasonable degree of certainty what level of desirability or undesirability to assign to every aspect of our lives, based on the guidance of divine revelation (Qur’an), its implementation in the life of the last Prophet (i.e. the Sunnah) or Ijtihad.
