The subconscious memory may be the direct cause of certain dreams.When the mind is centered on certain things, the sleeper goes over hislife again and again in phantom fashion. He lives over the experiencesof his daily life. Very often the ego enlightens the sleeper of somematerial thing for his own benefit, which he may use advantageously inhis waking state, but as he generally looks at the phenomena of dreamsas an hallucination of the brain, he allows many a golden opportunityto slip through his fingers because the materialist's brain cannotgrasp things of the spirit.All the knowledge and rubbish of our past lives is stored up in thesubconscious mind where it remains in minute form. Memory is only theawakening of the sub-conscious mind, a long and forgotten incident,that has made a deep impression on the mind, is apt to filter throughinto the conscious state in dreams. In time of illness or when one'svitality is low, the dream picture of the past is apt to play a veryprominent part in one's sleep. Childhood and long-forgotten scenescome up frequently and appear as real and genuine as if they had onlyhappened the previous day. They frequently give the dreamer joy orsorrow, according to the stages he passed through.Even action of past lives may come up into the subconscious. Dreams ofrunning around nude without any feeling of shame may be the memory ofa previous existence. Falling from a high cliff or trees. Being chasedaround by some wild animals may be attributed to a primitive past.Dreaming of primitive people, places and things, only takes thedreamer a step nearer the stone age, from whence he came. Instead oflooking at these subconscious dreams with horror and dread as somepeople do they should study them and shape their lives accordingly.