It is as if you began perusing a book on some deep subject by calling on the author for his help in understanding what you were about to read.
ويمكن تشبيه ذلك بالبدء بدرس كتاب يتناول موضوعا عميقا باستدعاء المؤلف من اجل المساعدة على فهم ما ستقرأونه .‏