I adore The Narnia Chronicles by the matchless CS Lewis. He makes all imitators and corrupters of the genre seem pretty poor fish by comparison.
I particularly like his symbolism.
In 'The Silver Chair' the captive Prince Rilian goes into a 'a fit of madness' at the same time each day and has to be strapped to the chair of the title.
In actual fact that is his only time of normality, at all other times he is sold out to that representative of evil, The Lady of The Green Kirtle.
Pardon me for explaining to those who are already way ahead of me.
Whatever wrong things we find ourselves attached to; however low we may sink; however much we may rub shoulders with the 'enemy' - there are always those small periods of time when our souls grasp the reality of our spiritual condition. At those times we can always be 'the returning prodigal' - and we know that our Father will take us back.