What is meant by “Shadow” work?

A little psychological background: The Shadow Weekend is conceptually based on the work of Carl Jung, author of “The Persona and the Shadow.”  The Persona represents the face each one of us knows and with which we consciously identify; The Shadow is the other face (or faces) which are kept unknowingly inside of us.  

During the weekend, each man strives to discover what lies in his own particular Shadow,  and to consciously acknowledge, befriend and relate to what is unknown inside of him. However, the most remarkable outcome of the Shadow Weekend is finding and embracing the “Gold” that lies deeply buried within Shadow