Pneuma is a Science-Fiction inspired concept, which deals with the topics of immortality, memories and the idea of mind uploading. This means that the mind can be transferred to an external medium. Imagine you could communicate with memories, the personality or the mind of someone beyond death.
Pneuma is the retention of your mind at a particular time, which will be stored in a small showcase like a valuable object. Like a everlasting light your Pneuma wanders the showcase. Beyond death others can interact and communicate with it. This allows us to say unsaid things, resolve open questions or get to know our ancestors. For some of us this might be a dystopian, ghostly idea, but for someone else Pneuma might help to get over the loss of a beloved person.