The Star Wars movie seem to lead you on all kind of adventures and at times parts of the films can be hard to explain. For example, why does Obi Wan vanish and where exactly did he go? If you are a hardcore Star Wars fan, you know that the answer is that Obi Wan had learned of the ghost force ability early on. With this power he is actually able to come back and can be heard by others. This allows him to continue to give guidance even though he is no longer actually present in his true form.