Emanuel Swedenborg was in his late fifties — a mining engineer, and one of the most respected natural scientists in Sweden — when he began reporting that the other world had opened to him. From the mid-1740s until his death in 1772 he claimed to move between worlds routinely: not in trance, he insisted, but with working senses. He wrote up what he saw with the flat thoroughness of an assessor filing reports. Heaven and Hell, published in Latin in 1758, reads less like a vision than like a census.
The report runs like this. A person who dies wakes after a few days in the World of Spirits, a middle country between heaven and hell, and is met by angels who ease the arrival. Nothing is decided there, because nothing needs to be: judgment in Swedenborg is not a court but a disclosure. In the world of spirits, the externals a person wore in life — manners, reputation, professed beliefs — gradually fall away until the ruling love, the thing a person actually loved most, stands exposed. Then the spirit simply goes where it belongs, the way water finds its level. Those who loved God and the neighbor find a heavenly society of people who loved likewise; those who loved dominion or only themselves descend, freely and even eagerly, to a hell that suits them. God casts no one down; the damned prefer their company.
His heaven is organized, employed, and social. It is made of innumerable societies, each a community of similar loves, and the whole of it — in his strangest and most famous image — has the form of a single vast human being, the Grand Man, in which every society is an organ and every angel a cell. All angels were once people. Heaven's joy is not rest but use: every angel has work matched to their love. Marriage continues, for those whose loves truly join. And history did not have to wait for its ending — the general Last Judgment, he reported, had already taken place in the world of spirits, in 1757, while London and Stockholm noticed nothing.
The book's afterlife was larger than its church. The New Church his readers founded stayed small, but the report leaked everywhere: into Blake, who annotated him furiously; into Emerson and the American transcendentalists; into Spiritualism, whose seance-room geography — progressive spheres, a bright, learning-oriented between-world that Andrew Jackson Davis named the Summerland — is Swedenborg's map redrawn by enthusiasts. Much of what the modern West vaguely assumes about heaven — that you wake as yourself, are met by people you love, are not sentenced but sorted, and have something to do — is closer to Swedenborg in 1758 than to any creed.
The framework's wager is double: that the afterlife is knowable by inspection, and that nobody is ever sent anywhere. Both halves scandalized the orthodox. Both halves quietly won.