Nancy Wood's Taos shamam (The Man Who Gave Thunder to the Earth) fell into an abyss because he lacked the balance, wisdom, and strength to keep one "foot" in each of the "two worlds." The stories of Black Elk and Lame Deer show that such situations are not ficticious.
Once a person decides that the world is not as he or she sees it, the responsiibility arises to "see" it "correctly." It helps to have a community that looks at things in approximately the same. But here (as everywhere) there is the danger of taking the community's view of reality as the True View. We want, as we say in Al Anon to "see things in their true perspective" which is the way other Al Anon members see things.* This helps each of us avoid the feeling that we have fallen into an abyss.
In this "realm of delusion," as i am coming to think of it, some of us think that others of us are more or less deluded than we are. Some are given credit for wisdom and others are said to have perceptions that are seriously flawed. Things that have, it seems, no relevance in the Kingdom of God (politics, economics, gender, education, social position, class, race, nationality, etc, etc.) guide us in making judgments about the "capacity" of ourselves and others
But do not despair. We do know how we are supposed to live our lives as material beings. The path is clearly marked for us in every culture (though often encased in bulky tomes edited by dozens or hundreds of "helpful" hands,)
My take on this later.