I was, I think, 18 years old when I saw the movie Flatliners; just the right age for it to make a vivid impression on me even though it has never been thought of as a particularly good film. The characters are medical students who agree to take turns temporarily dying ("flatlining") before being revived by the others. They hope to experience a moment of the afterlife to gain insight and wisdom. They wanted, in the parlance of this book, to learn from a visit to the land of the dead.
McDonald writes that we don't have to actually die to gain that wisdom, though, as stories of visits to the