Khenpo Karthar has collect a whole set of stories of great practitioners what he knew and these are written down in this book.

“The stories in this book are evidence of this (compassion) especially since most of the holy beings whose lives are recounted here began as ordinary people like us, and were not recognized emanations of buddhas or bodhisattvas.
            This book clearly demonstrates that we can, through diligence, achieve the same result. In particular, most of the events recounted here occurred during my lifetime, and were either witnessed by me or told to me at the time; these accounts are therefore trustworthy.”