Original sin in the context of "The City of God"

Augustine of Hippo (/ɔːˈɡʌstɪn/ aw-GUST-in, US also /ˈɔːɡəstiːn/ AW-gə-steen; Latin: Aurelius Augustinus Hipponensis; 13 November 354 – 28 August 430) was a theologian and philosopher, the bishop of Hippo Regius from Thagaste in Numidia Cirtensis, (present-day Souk Ahras, Algeria). His writings deeply influenced the development of Western philosophy and Western Christianity, and he is viewed as one of the most important Church Fathers of the Latin Church in the Patristic Period. His many important works include The City of God, On Christian Doctrine, and Confessions.

According to his contemporary, Jerome of Stridon, Augustine "established anew the ancient Faith". In his youth he was drawn to the Manichaean faith, and later to the Hellenistic philosophy of Neoplatonism. After his conversion to Christianity and baptism in 386, Augustine developed his own approach to philosophy and theology, accommodating a variety of methods and perspectives. Believing the grace of Christ was indispensable to human freedom, he helped formulate the doctrine of original sin and made significant contributions to the development of just war theory. When the Western Roman Empire began to disintegrate, Augustine imagined the Church as a spiritual City of God, distinct from the material Earthly City. The segment of the Church that adhered to the concept of the Trinity as defined by the Council of Nicaea and the Council of Constantinople closely identified with Augustine's On the Trinity.

Unitarianism is a nontrinitarian sect of Christianity. Unitarians affirm the unitary nature of God as the singular and unique creator of the universe, believe that Jesus Christ was inspired by God in his moral teachings and that he is the savior of mankind, but he is not equal to God himself. Accordingly, Unitarians reject the Ecumenical Councils and ecumenical creeds, and sit outside traditional, mainstream Christianity.

Unitarianism was established in order to restore "primitive Christianity before later corruptions set in". Likewise, Unitarian Christians generally reject the doctrine of original sin. The churchmanship of Unitarianism may include liberal denominations or Unitarian Christian denominations that are more conservative, with the latter being known as biblical Unitarians.

The Council of Trent (Latin: Concilium Tridentinum), held between 1545 and 1563 in Trent (or Trento), now in northern Italy, was the 19th ecumenical council of the Roman Catholic Church. Prompted by the Protestant Reformation at the time, it has been described as the "most impressive embodiment of the ideals of the Counter-Reformation." It was the last time a Catholic ecumenical council was organized outside the city of Rome, and the second time a council was convened in the territory of the Holy Roman Empire (the first being the Council of Constance).

The Council issued key statements and clarifications of the Church's doctrine and teachings, including scripture, the biblical canon, sacred tradition, original sin, justification, salvation, the sacraments, the Mass, and the veneration of saints and also issued condemnations of what it defined to be heresies committed by proponents of Protestantism. The consequences of the council were also significant with regard to the Church's liturgy and censorship.

The preternatural (or praeternatural) is that which appears outside, beside or beyond (Latin: præter) the natural. It is "suspended between the mundane and the miraculous".

In theology, the term is often used to distinguish marvels or deceptive trickery, often attributed to witchcraft or demons, from purely divine power of genuinely supernatural origin that transcends the laws of nature. Preternatural is also used to describe gifts such as immortality, possessed by Adam and Eve before the fall of man into original sin, and the power of flight that angels are thought to have. In the early modern period, the term was used by scientists to refer to abnormalities and strange phenomena of various kinds that seemed to depart from the norms of nature.

Adam and Eve, according to the creation myth of the Abrahamic religions, were the first man and woman. They are central to the belief that humanity is in essence a single family, with everyone descended from a single pair of original ancestors. They also provide the basis for the doctrines of the fall of man and original sin, which are important beliefs in Christianity, although not held in Judaism or Islam.

In the Book of Genesis of the Hebrew Bible, chapters one through five, there are two creation narratives with two distinct perspectives. In the first, Adam and Eve are not named. Instead, God created humankind in God's image and instructed them to multiply and to be stewards over everything else that God had made. In the second narrative, God fashions Adam from dust and places him in the Garden of Eden. Adam is told that he can eat freely of all the trees in the garden, except for the tree of the knowledge of good and evil. Subsequently, Eve is created from one of Adam's ribs to be his companion. They are innocent and unembarrassed about their nakedness. However, a serpent convinces Eve to eat fruit from the forbidden tree, and she gives some of the fruit to Adam. These acts not only give them additional knowledge, but also give them the ability to conjure negative and destructive concepts such as shame and evil. God later curses the serpent and the ground. God prophetically tells the woman and the man what will be the consequences of their sin of disobeying him. Then he banishes them from the Garden of Eden.

The fall of man, the fall of Adam, or simply the Fall, is a term used in Christianity to describe the transition of the first man and woman from a state of innocent obedience to God to a state of guilty disobedience. The doctrine of the Fall comes from a biblical interpretation of Genesis, chapters 1–3. At first, Adam and Eve lived with God in the Garden of Eden, but the serpent tempted them into eating the fruit from the tree of knowledge of good and evil, which God had forbidden. After doing so, they became ashamed of their nakedness and God expelled them from the Garden to prevent them from eating the fruit of the tree of life and becoming immortal.

In Nicene Christianity, the doctrine of the Fall is closely related to that of original sin or ancestral sin. Nicene Christians believe that the Fall brought sin into the world, corrupting the entire natural world, including human nature, causing all humans to be born into original sin, a state from which they cannot attain eternal life without the grace of God. The Eastern Orthodox Church accepts the concept of the Fall but rejects the idea that the guilt of original sin is passed down through generations, based in part on the passage Ezekiel 18:20, which says a son is not guilty of the sins of his father.