A labyrinth is a walking path and is an ancient practice used by many different faiths for spiritual centering, contemplation and prayer.  It is a path to walk slowly while quieting your mind and focusing on a spiritual question or prayer.  It is not a maze.  There is no trick to getting in or out of it.  It is path inward.  One stops at the center.  You then exit along the same path you entered.  One can take with them metaphorically a situation close to their heart, prayer about it at the center and then exit.  The intent of the labyrinth is simply to allow space to meditate.