All 4 Uses of

labyrinth
in
The Sunlight Dialogues

If he were not Hodge—dependable Hodge—if he were his younger brother Ben or his own son Luke, he would have been thrown into confusion by a labyrinth of conflicting, for the most part painful, emotions.†
Chpt 3

He was, like all his kind, an iron fence; but the fence was not square and neat, it was a labyrinth; and Hodge, in Clumly's presence, felt a mysterious temptation to try his luck in its wanderings.†
Chpt 5

Definitions:

(1) (labyrinth)
a maze (a complex system of paths or tunnels in which it is easy to get lost)

or (figuratively): anything so complicated that it is extremely confusing

The word "labyrinth" comes from the name of the maze of passages where, in Greek mythology, Theseus had to escape from the Minotaur.
(2) (meaning too rare to warrant focus)
meaning too rare to warrant focus:

Less commonly, labyrinth can refer to a complex anatomical system of interconnecting cavities -- especially the inner ear