Arabic with English translation, 'Kitab Sharb 'Aja'ib al-Qalb' Book XXI of the Revival of the Religious Sciences Ibya 'Ulum al-Din. This is the English translation of Book 21 of Imam Al-Ghazali's Revival of the Religious Sciences (Ihya' 'Ulum al-Din), widely regarded as one of the Great Classics of Islamic History. The Heart's Disease and their Cures Imam al-Ghazali uses a series of traditional teaching stories to illustrate the theme of the heart as a mirror. The light of the divine sun can only shine in the heart when the seeker recalls the Prophet's teaching that 'everything has a polish, and the polish of hearts is the remembrance of God.' Bad character traits, acquired through faulty upbringing, are like 'a smoke which clouds the heart's mirror'; this is the 'heart's rust' mentioned in the Qur'an.. But the one who has polished his heart is made luminous by Allah's light, and brings that light to others, which is the quality of sainthood.