The brain...one more time

The brain records (though selectively) our personal sensory experiences. Retrievable or not, are they permanently recorded? Can they be found and released? They are frequently released as thoughts, ideas, concepts, dreams, images, and become collective human property. When transmitted, they link brains in an ever connected network through time and space. Is this the accumulation that becomes the cloud of human consciousness? Does it in any way scratch at the door of eternity?