The Divine Principle or Exposition of the Divine Principle (in Korean, Wolli Kangron) is the main theological textbook of the Unification Church. It was co-written by church founder Sun Myung Moon and early disciple Hyo Won Eu. It lays out the core of Unification theology, and is held to have the status of scripture by believers. Following the format of systematic theology, it includes [1] God's purpose in creating human beings, [2] the fall of man, and [3] redemption - the process through history by which God is working to remove the ill effects of the fall and restore humanity back to the relationship and position that God originally intended.

History of Christianity

"Examine the history of Christianity. Professing the salvation of humankind, Christianity has expanded through a tumultuous history of two thousand years, extending its influence throughout the world in the present era. Yet what has become of the Christian spirit that once cast flames of life so brilliant that, despite the most brutal persecution by the Roman empire, Roman citizens were brought to their knees before the crucified Jesus? Medieval feudal society buried Christianity alive. Even though the Reformation raised high the torch of new life, its flame could not turn back the sweeping tide of darkness. When ecclesiastic love waned, when waves of capitalistic greed surged across Christian Europe, when starving masses cried out bitterly in the slums, the promise of their salvation came not from heaven but from the earth. Its name was communism. Christianity, though it professed the love of God, had degenerated into a dead body of clergy trailing empty slogans. It was then only natural that a banner of rebellion would be raised, arguing that a merciless God who would allow such suffering could not exist. Hence, modern materialism was born. Western society became a hotbed of materialism; it was the fertile soil in which communism flourished. Christianity lost the ability to equal the successes of either communism or materialism and failed to present the truth that could conquer their theories. Christians watched helplessly as these ideologies budded and thrived in their midst and expanded their influence all over the world. What a pity this is! What is more, although Christian doctrine teaches that all humanity descended from the same parents, many citizens of Christian nations who profess this doctrine will not even sit together with their brothers and sisters of different skin colors. This illustrates the actual situation of today's Christianity, which has lost much of the power to put the words of Jesus into practice. It has become a house of lifeless rituals, a whitewashed tomb."
-Introduction, Divine Principle

Purpose of democracy

"How can democracy accomplish its purpose? With the flow of history, humankind's spirituality has become enlightened due to the merit of the age in the providence of restoration. People's original minds respond to the providence and seek religion, often without their knowing why. Eventually, people will come to receive Christianity, which God is raising to be the highest religion. In this way, the world today is converging to form a single civilization based on Christian ideals.
As history nears its consummation, the will of the people inclines toward Christian values. Democratic governments which abide by the will of the people also gradually become more Christian. Thus, when the Messiah returns to societies under the rule of democratic governments well-matured by the Christian spirit, he will be able to establish God's sovereignty upon the earth with the wholehearted support of the people. This will be the Kingdom of Heaven on earth. We need to understand that democracy was born to undermine satanic monopolies of power for the purpose of God's final providence to restore, by the will of the people, a heavenly sovereignty under the leadership of the returning Christ."
- Principle of Restoration, Unification Church Divine Principle

Sructure of government

"The universe, as we have seen, is patterned after the structure of a perfect human being. By the same token, the ideal world to be built by fully mature people is also to resemble the structure and functions of a perfect individual.10(cf. Creation 1.1; 1.2; 3.2) By analogy with the human body, whose organs function in accordance with the subtle commands of the brain, all the institutions of the ideal global society are to abide by the desires of God. Just as the commands of the brain are transmitted to every part of the body through the peripheral nervous system branching out from the spinal cord, in the ideal world God's guidance is conveyed to the entire society through Christ, who corresponds to the spinal cord, and God-loving leaders, who correspond to the peripheral nervous system. The peripheral nervous system branching out from the spinal cord corresponds to a nation's political parties. Thus, in the ideal world, people of God led by Christ will form organizations analogous to today's political parties...

Therefore, Christ at the Second Advent will remedy the illness of the present political system that it may reflect God's design by restoring people's vertical relationship with God. This will unleash society's true potential."
- Divine Principle, Unification Church

Unity of languages

"If we are to realize the ideal world of one global family which can honor Christ at the Second Advent as our True Parent, surely our languages must be unified. As expressed in the account of the building of the Tower of Babel, chaos was brought to our languages when we exalted the will of Satan. The principle of restoration through indemnity requires that we participate in the construction of God's tower and the glorification of God's Will as the way to unify all languages.
Based upon which language will all languages be unified? The answer to this question is obvious. Children should learn the language of their parents. If Christ does indeed return to the land of Korea, then he will certainly use the Korean language, which will then become the mother tongue for all humanity."
- Divine Principle, Unification Church

What is fascism?

"What, then, is fascism? Fascism denies the fundamental values of modern democracy, including respect for the individual and his basic rights, freedoms of speech, the press and association, and the parliamentary system. Race or nationality is the ultimate value, to be upheld by a strong nation-state. Individuals and institutions exist only for the benefit of the state. Under fascism, individuals cannot claim freedom as their inviolable right; they are to sacrifice their freedom in their duty to serve the state. The guiding political principle of fascism holds that all power and authority should be entrusted in one supreme leader rather than distributed among people. The personal will of the leader dictates the governing ideology for the entire nation. Mussolini in Italy, Hitler in Germany, and the leaders of Japan's militaristic government were dictators of the fascist type."
- Divine Principle, Unification Church

Purpose of history

"Third, by examining trends in the history of conflict, we can understand that human history is the history of the providence of restoration. Battles over property, territory and people have continued without interruption, expanding their scope in step with the progress of human society. The scale of these struggles has broadened from the family level to the levels of tribe, society, nation and world until today, when the democratic world and the communist world confront each other in a final conflict. In these Last Days of human history, heavenly law has descended upon the earth in the name of democracy, bringing an end to the long phase of history in which people sought to obtain happiness by seizing property, land and people. At the conclusion of World War I, the defeated nations gave up their colonies. At the end of World War II, the victors voluntarily liberated their colonies and provided them with material aid. In recent years, the great powers have invited weak and tiny nations, some smaller than one of their own cities, to become member states of the United Nations, giving them equal rights and status in the brotherhood of nations. What form does this final war between democracy and communism take? It is primarily a war of ideologies. Indeed, this war will never truly cease unless a truth emerges which can completely overthrow the ideology of Marxism-Leninism that is threatening the modern world. Communist ideology negates religion and promotes the exclusive supremacy of science. Hence, the new truth which can reconcile religion and science will emerge and prevail over the communist ideology. It will bring about the unification of the communist and democratic worlds. The trend of the history of conflict thus confirms that human history is the providential history to restore the original, ideal world."
- Divine Principle, Unification Church