According to Emory Elliott, Thomas Hooker (1586-1647) "favored a more liberal membership policy [than his rival John Cotton], and he devised an elaborate preparation process that involved precise psychological stages on the way to conversion.
The six essential stages of this morphology of conversion were contrition, humiliation, vocation, implantation, exaltation, and possession; and these he subdivided further. He required that a prospective member demonstrate to him and then to the congregation a successful passage through these stages" (Cambridge History of American Literature, Vol. 1, 201).