Jeremy Bearimy, in cursive script describes the nature of time in the afterlife. However it also describes the plot of this episode. The gang has discovered who Michael and Janet are, then learn the plot of the first two season.
With this knowledge everyone…. gives up. Then they start doing good things (unexpectedly). Chidi takes his shirt off, goes shopping then explains 2,500 years of western philosophy in a few minutes. This episode could stand alone as a synopsis of all three series. Amazing !