What is The Matterlightblooming Phenomenon?

The matterlightblooming phenomenon, as it is referred to by the people in the bardo, symbolizes acceptance and the ability to move on. When any of the occupants vanish in a flash of light, it is because they have finally accepted their death and are willing to pass on to their next life. The characters who have not accepted their deaths view this phenomenon as malevolent and destructive. The phenomenon shares a parallel with the acceptance that Abraham Lincoln ultimately experiences with regards to the grief he has for his deceased son, Willie.