[Psychoanalysis and the child psyche. An encounter in "a fertile land" or in a desert?]

How can we have a representation of and describe early psychic life in its beginning activity before any language formation, before the child can talk about it, before it becomes organized in a sequence of memories? Construction of these early moments is part of the analytical understanding but what are the conditions necessary for its relevance? What do the mother and other interactive persons convey to the infant?