Catechetical School of AlexandriaThe Catechetical School of Alexandria was a school of Christian theologians and bishops and deacons in Alexandria. The teachers and students of the school (also known as the Didascalium) were influential in many of the early theological controversies of the Christian church. It was one of the two major centers of the study of biblical exegesis and theology during Late Antiquity, the other being the School of Antioch. According to Jerome the Alexandrian school was founded by John Mark the Apostle.
Substitutionary atonementSubstitutionary atonement, also called vicarious atonement, is a central concept within Western Christian theology which asserts that Jesus died "for us", as propagated by the Western classic and objective paradigms of atonement in Christianity, which regard Jesus as dying as a substitute for others, instead of them.
Christian views on sinIn Christianity, 'sin' is an immoral act considered to be a transgression of divine law. The doctrine of sin is central to the Christian faith, since its basic message is about redemption in Christ. Hamartiology, a branch of Christian theology which is the study of sin, describes sin as an act of offence against God by despising his persons and Christian biblical law, and by injuring others. Christian hamartiology is closely related to concepts of natural law, moral theology and Christian ethics.
Salvation in ChristianityIn Christianity, salvation (also called deliverance or redemption) is the saving of human beings from sin and its consequences—which include death and separation from God—by Christ's death and resurrection, and the justification entailed by this salvation. The idea of Jesus' death as an atonement for human sin was recorded in the Christian Bible, and was elaborated in Paul's epistles and in the Gospels. Paul saw the faithful redeemed by participation in Jesus' death and rising.
Christian mysticismChristian mysticism is the tradition of mystical practices and mystical theology within Christianity which "concerns the preparation [of the person] for, the consciousness of, and the effect of [...] a direct and transformative presence of God" or Divine love. Until the sixth century the practice of what is now called mysticism was referred to by the term contemplatio, c.q. theoria, from contemplatio (Latin; Greek θεωρία, theoria), "looking at", "gazing at", "being aware of" God or the Divine.
PurgatoryPurgatory ( purgatorium, borrowed into English via Anglo-Norman and Old French) is, according to the belief of some Christian denominations and Islam, an intermediate state after physical death for expiatory purification. The process of purgatory is the final purification of the elect, which is entirely different from the punishment of the damned. Tradition, by reference to certain texts of scripture, sees the process as involving a cleansing fire. Some forms of Western Christianity, particularly within Protestantism, deny its existence.
