Everything we have ever Experienced. Only I have heard that it is Hard to get Passed the So called "Critical Factor". ie, as in Hypnosis. Is Lucid Dreaming in fact a way of "Tricking" the Sub-Conscious Mind. I mean is every picture, sound, in fact, every experience we have ever had locked away in our heads somewhere and available to easy access???. Kind of like all those Old VHS tapes that have been locked away for years.