Thanks everyone. This is really interesting, and leads to something else I've been wondering about..
Skydust points out that guides know individuals; I assume this is somewhat like how a spouse knows a partner or a parent knows a child? Is this then how guides are able to make predictions about one's future: By knowing how a person behaves, looking at their path from "on high", and seeing where one is likely to go? Or is this kind of precognition something else entirely?