This book became the standard text for studying the Unification Principles. It represents a revolutionary, clear and logical explanation of God, human beings and the universe. The text roughly consists of three main parts:
- God and his original ideal.
- How the ideal was destroyed, and evil entered the world.
- The long process that was necessary for us humans to find our way back to God and his original ideal.
The last of those main sections constitutes the larger part of the text as it shows in detail the thousands of years of historical development and the principles underlying it.
Other themes the text deals with are our spiritual reality, the end times, the Messiah’s mission, resurrection, Christology, predestination and the Second Coming.
The Korean title is Wolli Kangron. It was later translated into English as Divine Principle (1973). This English version was used to translate the Unification Principles into other Western languages. For a long time there were no Western members who knew Korean. Therefore, there were also several concepts in Father Moon‘s teachings that were not understood correctly until long after the movement first came to the West.
A new and improved translation was published in 1996 as Exposition of the Divine Principle. At the same time, more and more people gained a better understanding of the original language and the new terms.
Nine years after Wolli Haeseol (Literally Explanation of the Principles) was published in August 1957, Wolli Kangron (Literally Exposition of the Principles) was published on May 1, 1966. The book explains in a deeper way and in greater detail the content of Wolli Haeseol, which was written as a new interpretation of and a new perspective on the 66 books of the Bible. Wolli Haeseol was only published in Korean.
Hyo-won Eu (1914-70), who joined the movement in December 1953, after receiving a thorough introduction to Sun Myung Moon‘s teachings, wrote most of the text in Wolli Kangron. Chang-seong Ahn, Kwang-yeol Yu, and Yeong-chang Jang helped prepare the written material for printing.
Wolli Kangron was published by Segye Kidokyo Tongil Shillyeong Hyeophwe (Holy Spirit Association for the Unification of World Christianity).