Kīmīyā-yi Sa'ādat (Persian: کیمیای سعادت English: The Alchemy of Happiness/Contentment) is a book written by Abū Ḥāmid Muḥammad ibn Muḥammad al-Ghazālī, a Persian theologian, philosopher, and prolific Muslim author, often regarded as one of the greatest systematic thinkers and mystics of Islam, in Persian. The Kimiya-yi Sa'ādat was written towards the end of his life shortly before 499 AH/1105 AD. During the time before it was written, the Muslim world was considered to be in a state of political, as well as intellectual unrest. Al-Ghazālī, noted that there were constant disputes about the role of philosophy and scholastic theology, and that Sufis became chastised for their neglect of the ritual obligations of Islam. Upon the release of this book, the Kimiya-yi sa'ādat allowed al-Ghazali to considerably cut the tensions between the scholars and mystics. Kimiya-yi sa'ādat emphasized the importance of observing the ritual requirements of Islam, the actions that would lead to salvation, and avoidance of sin. The factor that set the Kimiya-yi sa'ādat apart from other theological works at the time was its mystical emphasis on self-discipline and asceticism. Source: Wikipedia (en)