Intermediate state (Christianity) in the context of "Eternal life (Christianity)"

Purgatory (Latin: purgatorium, borrowed into English via Anglo-Norman and Old French) is a belief in Catholic theology. It is a passing intermediate state after physical death for purifying or purging a soul before entering Heaven. A common analogy is dross being removed from gold in a furnace.

In Catholic doctrine, purgatory refers to the final cleansing of those who died in the State of Grace, and leaves in them only "the holiness necessary to enter the joy of heaven"; it is entirely different from the punishment of the damned and is not related to the forgiveness of sins for salvation. A forgiven person can be freed from his "unhealthy attachment to creatures" by fervent charity in this world, and otherwise by the non-vindictive "temporal (i.e. non-eternal) punishment" of purgatory.

Religions with the belief in a final judgment, a resurrection of the dead or an intermediate state (such as Hades or purgatory) often offer prayers on behalf of the dead to God.

Hades, according to various Christian denominations, is "the place or state of departed spirits", borrowing the name of Hades, the name of the underworld in Greek mythology. It is often associated with the Jewish concept of Sheol. In Christian theology, Hades is seen as an intermediate state between Heaven and Hell in which the dead enter and will remain until the Last Judgment.

Adventism is a branch of Protestant Christianity that believes in the imminent Second Coming (or the "Second Advent") of Jesus Christ. It originated in the 1830s in the United States during the Second Great Awakening when Baptist preacher William Miller first publicly shared his belief that the Second Coming would occur at some point between 1843 and 1844. His followers became known as Millerites. After Miller's prophecies failed, the Millerite movement split up and was continued by a number of groups that held different doctrines from one another, being Ellen G. White the best known leader and writer. These groups, stemming from a common Millerite ancestor, collectively became known as the Adventist movement.

Although the Adventist churches hold much in common with mainline Christianity, their theologies differ on whether the intermediate state of the dead is unconscious sleep or consciousness, whether the ultimate punishment of the wicked is annihilation or eternal torment, the nature of immortality, whether the wicked are resurrected after the millennium, and whether the sanctuary of Daniel 8 refers to the one in heaven or one on earth. Seventh-day Adventists and some smaller Adventist groups observe the seventh day Sabbath. The General Conference of Seventh-day Adventists has compiled that church's core beliefs in the 28 Fundamental Beliefs (1980 and 2005).

Christian mortalism is the Christian belief that the human soul is not naturally immortal, and may include the belief that the soul is "sleeping" after death until the Resurrection of the Dead and the Last Judgment, a time known as the intermediate state. "Soul sleep" is often used as a pejorative term, so the more neutral term "mortalism" was also used in the nineteenth century, and "Christian mortalism" since the 1970s. Historically the term psychopannychism was also used, despite problems with the etymology and application. The term thnetopsychism has also been used; for example, Gordon Campbell (2008) identified John Milton as believing in the latter.

Christian mortalism stands in contrast with the traditional Christian belief that the souls of the dead immediately go to heaven, or hell, or (in Catholicism) purgatory. Christian mortalism has been taught by several theologians and church organizations throughout history, while also facing opposition from aspects of Christian organized religion. The Catholic Church condemned such thinking in the Fifth Council of the Lateran as "erroneous assertions". Supporters include eighteenth-century religious figure Henry Layton, among many others.

Barzakh (Arabic: برزخ) is an Arabic word meaning "obstacle", "hindrance", "separation", or "barrier". In Islamic eschatology, it denotes a barrier separating the world of humans (heaven, earth, underworld) from the world of spirits. It can also refer to a phase/"stage" between an individual's death and their resurrection in "the Hereafter". It is also considered as a place where souls rest until the day of judgement. It bears resemblance to the intermediate state in Christianity.

Some scholars believe that good Muslims will have a heavenly experience during this time, and sinners will experience suffering; while some Shia scholars believe the experience will not be like the physical pain or pleasure of the temporal world.