(Unlike a maze a labyrinth is not a puzzle and has no dead ends - it is a convoluted path to be walked from its beginning to its end.)

A labyrinth has one route.  From the beginning of the spiritual journey there is only one route: towards God.  The way may twist and turn.  At times it may seem to be 

The medieval labyrinth of Chartres cathedral

This is a journey which matches the path of our life.  

From the moment of birth we can only follow one path - going back is impossible.  For all the options available to us and the decisions we make - for all that we know life would have been different had we made a different choice - even so there is only ever one path for each of us.

Boticelli's Labyrinth from The Gospel of the Holy Twelve