"Let us accept the possibility that there is, at death, not a..." — Paul Quarrington quote meaning

Let us accept the possibility that there is, at death, not an abrupt cessation of energy, rather a dispersal. This seems more than reasonable to me. Mind you, I've owned a series of old cars, and I"m used to turning off the motor only to experience a series of rumblings and explosions that would shame many a volcano. This is the sort of thing I'm conceptualizing, a kind of clunky running-on. And just as some cars are more susceptible to this behavior, so people vary in the length of time, and the force with which, their energy sputters and gasps. . . My example is overly dramatic, but it is not wholly unreasonable, and it serves to make this genetic mutation a player at the evolutionary table. You see what I'm getting at: a biologically and evolutionally sound model for the soul. (I didn't say I'd achieved it.) Let's conceive of the soul as an aura that human beings wear on their backs, cumberson as a tortoise's carapace. Some are larger than others.