According to the earliest sources, compiled from the works of Ibn Rajab al-Hanbali, Ibn al-Qayyim al-Jawziyya and Abu Hamid al-Ghazali, collected and arranged by Ahmad Farid. One the most concise references that can have a big impact on you once you read it. Topics gone into detail include symptoms of the heart's sickness and signs of its health, doing without the pleasures of this world, perseverance, complete reliance on Allah, the life of this world, to mention only a few. Excellent read!