The purpose of the book is to clarify and predict the path that the imperfect human mind has to go through in order to achieve the same perfection that distinguishes the original existence - the First Mind and manifests itself in eternal "bliss and reassurance." A hundred years ago, this book was available only to a narrow circle of initiates, for many centuries it was surrounded by a halo of mystery, which gave rise to many fantastic and not always friendly legends. The author of the book, Hamid al-Din al-Kirmani, was an Ismaili preacher and was constantly engaged in promoting his teachings; he held a very high rank of khudji in both Iraq (Iraq and Persia). The dates of his birth and death are unknown; it is only safe to say that he died after 1020, it is assumed that he was a Persian and came from the Iranian city of Kirman.