I will take a layman's crack at it. The paper discusses how crises and times of high stress and/or prolonged periods of social isolation, sleep deprivation, etc

I will take a layman's crack at it. The paper discusses how crises and times of high stress and/or prolonged periods of social isolation, sleep deprivation, etc. can precipitate a psychological state (with accompanying neurochemical phenomena which I cannot speak to but appear to be centered around serotonin) that can foster rapid psychological transformation and re-arrangement of one's self-concept, their core beliefs about themselves and others, and their ultimate framing of and relationship to the world. A "resurrection." Under suboptimal conditions it can lead to a descent into psychosis. I am reminded of Jung's own brushes with such states as chronicled in the Red Book.