This conclusion presents some closing thoughts on key concepts discussed in the preceding chapters of this book. The book explores some of the desperate gaps in modern science. It argues that there is an unknown world outside the diving bell of peoples' physical space, and that the unconscious mind can sometimes make contact with it, is much more contentious. Humans make contact with that world very rarely and irreproducibly. The book explores the notion that such contact, where it occurs, does so via the unconscious mind. It looks critically at many of the claims of 'parapsychology', which seems to be largely concerned with the doings of the unconscious mind. The book analyses such claims from a scientific perspective, as Henry Sidgwick and his followers aimed to do in the Psychical Research Society from 1882 onwards.