Many wonder about the nature of lucid dreaming state in relation to the brain, i.e. whether or not lucid dreaming is all in one’s head. But in the context of applying lucid dreaming, this is not a valid concern. Perception of the entire physical environment is performed through sensory organs. In lucid dreaming, perception is the same, sometimes even more realistic. Whether everything described in this chapter occurs in reality or is merely simulated makes no difference in terms of the encountered sensations.