This book offers a deep understanding of spiritual heart disease, which has become prevalent in our society today. We live in an era when the trials of doubt and desire have become unrestrained and have filled most of our hearts with spiritual diseases. In addition, there are so few scholars who give authentic advice, and those who use effective spiritual treatments have become so rare. We feel an urgent need to cleanse our hearts, to cleanse them of these diseases and to protect them from what surrounds them. And we can think of no one else than Shaykh al-Islam ibn Taymiyyah (may Allah have mercy on him) who explained to us the reality of our ailments and the proper use of remedies so that we can be cured with the help of Allah.