Note that all references to "Father" in this book are to Rev. Sun Myung Moon, and all references to "Mother" are to his wife, Mrs. Hak Ja Han Moon. References to "True Parents" are to Rev. and Mrs Moon.
These lectures were originally printed in "Father's Course and our Life of Faith, 21 Lectures by Won Pil Kim." The forward to the book says:
The lectures in this book were given by Father's first disciple, Won Pil Kim, as part of a 21-day leadership course held in London in 1979. Mr. Kim gave the lectures in Japanese. The English translation has been edited as sparingly as possible. May this book serve as a source of life and inspiration for the years to come to brothers and sisters throughout the world who are following in the footsteps of our True Parents.