User blog comment:Zathronas/Analysis by an author: Dust secrets/@comment-50.187.149.248-20140823015027/@comment-10380701-20140823015146

It's pretty much the concept of "Ashes to Ashes, Dust to Dust."

Mankind came from dust, so it's only fitting if they die, they become a part of the world once again.

It's very Lifestream-esque.