A Guide to Conclusive Proofs for the Principles of Belief (Arabic: الإرشاد إلى قواطع الأدلة في أصول الاعتقاد, romanized: Al-Irshad ila Qawati' al-Adilla fi Usul al-I'tiqad), commonly known simply as Al-Irshad ("The Guide"), is a major classic of Islamic theology. Its author, Imam al-Haramayn al-Juwayni, was the leading theologian of his time. His writings in the field of theology, especially Al-Irshad, represent a high point of the development of theology in the then contemporary Islamic world. Source: Wikipedia (en)