Nevertheless, the late Imam, believing that more people should benefit from the subjects of the book, set upon writing this book in a simpler language. He says:
"Before this, I prepared a paper in which I wrote on the secrets of the Salat as much as was feasible. But as it was not suitable for the common people, I decided to write parts of the cordial disciplines of this spiritual ascension, so that my brothers in faith may have a remembrance, and my hard heart may be affected by it."
Formerly, the folds [matawi] of the book Adabus Salat, with explanations and revisions, had been published under the title: Flying in the Heavenly Kingdom.
Then the book itself was published. The former editions, however, were not agreeable, for some reasons. One of the reasons might probably have been the lack of a manuscript. Therefore, The Institute for Compilation and Publication of Imam Khomeini's Works set forth to publish this work, with complete precision, faithfulness, and reference to the available copies, and collating them with the original MS (manuscript) copy which is within the reach of this Institute.
The book includes two prefaces, which the Imam wrote in 1363 S.H., dedicating this work to his respected son, Hujjatul Islam wal Muslimin, Haj Sayyid Ahmad Khomeini, and to Mrs. Fatimah Tabataba'i (wife of Haj Sayyid Ahmad Khomeini).
This edition is accompanied by footnotes and explanations, in which the sources and the references of the hadiths and statements are stated, and the Arabic texts are translated. All these marginations -except a few which the Imam himself had written down and are marked by an asterisk (*) (in the Persian copy) -as well as the different indexes of the book, have been prepared and arranged by this Institute.
Certain Islamic and gnostic terms have been printed in italics or in black (beside the titles of the books). Some of these terms have been explained in English in the GLOSSARY at the end of the book.