An Epiphany moment is when we see something in a dramatic new way. In this case Peter, James and John see Jesus with his body and cloths changed in a dramatic, visible way; talking to Elijah and Moses (Mark 9.2-13). This is not a dream. There are three very awake and frightened witnesses. The witnesses are having the epiphany moment of their lives. They are seeing Jesus as part of the invisible spiritual dimension of the Bible. This is a glimpse of the heavenly kingdom in intruding into our physical world.