Editor's note: In his masterpiece, Ihya 'Ulum al-Din, Imam al-Ghazali writes passionately about the evils of not acting on knowledge and the signs of the 'ulama of the hereafter. A condensed version of this lengthy passage was rendered into Urdu by Shaykh al-Hadith Mawlana Muhammad Zakariyya Kandhalawi and produced in part two of Fada'il-i-Sadaqat, which was subsequently translated from Urdu into English by M. Tayyab Bakhsh Badayuni. These...