Father was predicting that if the Cheon Seong Gyeong or any of the Great textbooks were changed, there would be a split in the church. He knew this and he predicted this.

“The reason why we are having this time is because [I’m worried that I] might leave behind affirmations that could be criticized after I leave to Spirit World. We have to make it very clear. The word Cheon Seong Gyeong is a very dreadful word. Any person, a third person, regardless of how great they may be, even if they have several Nobel prizes under their belt, nobody can touch [or change] the Cheon Seong Gyeong. That’s why new denominations will not arise. (447-187, 2004. 11. 26)

"Therefore, True Parents would like to convey everything but the first thing that we would like to convey is the Word, the historical Word, the Word that True Parents loved, the Word that God desired, which is given through True Parents. These words are not simply words for their own sake; they are derived from the core of the Word, from its substance, and reach to the realm of its counterpart with external form. I will pass on the Word, the Word of God’s hope and Word that True Parents practiced centering on the standard of that hope, that you become the representative of that Word. When you become the owner of the Word and not only read the words but also approach their deeper content, you will find the words, “achieving victory over resentment.” Transfer of True Parents' Authority Ceremony and Hyung Jin Moon's Inauguration Ceremony April 2008

“Please take care of these Eight Great Textbooks more than me at this time because I am living in those textbooks. I am in the Word”. [Meaning of the Eight Great Textbooks, given at the European Leaders’ Assembly (August 19-24, 2012]

"I know when there are some changes in what I’ve said, even a word or colon. I check repeatedly to leave perfection behind when I die. You should be the same way. When you leave a historic inheritance to your descendants, you must make sure you’re leaving something flawless. That’s how you can inherit True Parents’ position. This is absolutely true. Otherwise, you can’t pass through the door into the spirit world behind True Parents. You’ll end up creating paradise or hell right before the doorstep of heaven. There won’t be any restoration for thousands or tens of thousands of years". Sun Myung Moon, Declaration of the Realm of Life of the Unity and Completed Settlement of the Parents of Heaven and Earth August 5, 2002 Sutaek-ri, Korea

“The words of Rev. Moon of the Unification Church, the Cheon Seong Gyeong, nobody can touch this. If you go to Heaven and then you say to Rev. Moon, “This [content] was lacking,” then I would reply, “Oh, okay”, and let it go. That’s why as an exercise I am leaving behind a secret code here and there without anyone’s knowledge. That’s something people don’t know about”. [446-105, 2004. 4. 22]

“The reason why we are having this time is because [I’m worried that I] might leave behind affirmations that could be criticized after I leave to Spirit World. We have to make it very clear. The word Cheon Seong Gyeong is a very dreadful word. Any person, a third person, regardless of how great they may be, even if they have several Nobel prizes under their belt, nobody can touch [or change] the Cheon Seong Gyeong. That’s why new denominations will not arise. We are preparing for that. You never know maybe I’ll announce part two from Spirit World”. [447-83, 2004. 4. 30]

“The reason I am teaching about the Cheon Seong Gyeong is for the education of sons and daughters who can go to Heaven, it’s not for me to sell them [this book]. It’s a textbook, text book. Do you understand? “Yes.” Okay, what percentage of you are united here? If someone reads even one syllable incorrectly during Hoon Dok Hae, I correct them. The denomination should not arise in the Unification Church because we leave behind this kind of mistake”. [464-280, 2004. 8. 15]

“If you’ve read it five times, then don’t criticize it and don’t touch it! Sun Jo Hwang, do you understand?! “Yes.” Just because you are the head of the History Compilation Committee and even if you were to memorize all the records of all the historical events, you still don’t have the authority to modify [the content]. Until I look at it and explain it, then there’s a reason why I’m leaving it the way it is”. [477-187, 2004. 11. 26]

“I’m saying that you should not touch the Cheon Seong Gyeong with regards to its contents. I’m telling you not to touch it, even if you have to explain the historical context by making a separate book. Because I proclaimed the Cheon Seong Gyeong and because I read it more than 5 times, Spirit World is saying that nobody on earth who has read it less than 5 times can touch it”. [479-132, 2004. 12. 3]

“Also, I don’t want anyone newly changing [or editing] anything among the things I wrote. They don’t know why the content is the way it is. If they change the content without knowing, then they will be judged by everyone when they go to the other world. They will be charged for it. That’s why nobody should touch it without [my] permission”. [493-287, 2005. 4. 26]

“You stupid idiots (Korean: ba-bo)! What does a ‘stupid idiot’ mean? We see them and have to deal with them. We have to move beyond that. There’s no other way. It is with that content that I spoke of the Cheon Seong Gyeong or the Pyeong Hwa Shin Gyeong(Peace Messages); they don’t contain any of my personal feelings. That’s why I’m telling you not to mix in any other words into it. If I said ‘shit’ then it’s ‘shit’, if I said ‘fist’ then it should read ‘fist’. I will be the one to untangle that. I will say, ‘they couldn’t change it around carelessly because it’s the most precious thing.’ It is accomplished with these words. It’s very simple”. [596-57, 2008. 8. 17, Cheon Jeong Goong]

“You tend to summarize the Divine Principle book and you think that if you just know that summary then you don’t have to do anything beyond that. So you talk whatever you want and leave [the main book] thrown away. I don’t like that. I already know. I know how fake it is, and I know how different it is from the original script. I don’t like that. Do not touch things with regards to what I wrote. I know how it smells. Even though you go ahead and publish it and just put it on my table. Even though you may say you received a doctorate and you will receive my signature, I can’t just give it away. I want to make decisions by an appraisal method by deciding (O) or (X). We must distinguish what Heaven requires. I am that kind of person. Had I been ignorant on my sermon volumes, it would have been a big problem. Even if I die, I would become the teacher who left without leaving behind my book”. [557-309, 2007. 3. 1]

“What does it mean that I’m attending Hoon Dok Hae? It means that I discovered these words, I recorded them, and I edit them. I read these thousands of times, but it took 3 years just to make these Pyeong Hwa Hoon Gyeong (Peace Messages). When explaining the laws established in the constitution, the world can change if you make a mistake in even one word. ... That’s why it was with a life or death determination that True Parents made corrections. In the position of True Parents, we have to uproot all the people in humanity who went to Hell and we have to make a textbook for them. Do you understand? Anything aside from this textbook does not work, regardless of how good it may be”. [574-97, 2007. 8. 30]

“Okay, the Cheon Seong Gyeong and the Pyeong Hwa Shin Gyeong are the way that you must go. It’s not the path that True Parents have to walk. There’s nothing to remove from this [content]. You have to live with these words”. [595-218, 2008. 8. 10, Cheon Jeong Goong]

“If I go to Spirit World now, although I am preparing to go to Spirit World right now, the restoration through indemnity on earth is actually finished. I have prepared the Cheon Seong Gyeong [for you] at this final point. I have prepared it all”. [567-15, 2007. 6. 25]

“Now it is all finished. There is nothing left to touch [change]. I immediately know if someone changes even one syllable [in the text] because I read those textbooks several hundred times. You must memorize it all. ‘Owner of peace, owner of lineage’, Cheon Seong Gyeong, Family Pledge, and the World Scriptures. All the textbooks are included for 12 years of Cheon Il Guk”. During Hoon Dok Hae of ‘North- South Unification seen from the perspective of God’s Providence’ Chapter 3, paragraph 3-6