A ¹⁷ This I say, therefore, and testify in the Lord, that you should no longer walk as the rest of the Gentiles walk, 

B  in the futility of their mind, ¹⁸ having their understanding darkened, being alienated from the life of God, 

C  because of the ignorance that is in them, 

C’  because of the blindness of their heart;

B’  ¹⁹ who, being past feeling, have given themselves over to lewdness, to work all uncleanness with greediness.

A: The Command: Don’t Walk the Way You Used To Walk.
B: The Characteristics of the Sinful Mind/Mindset.
C: The Ignorant Mind.
C’: The Blind Heart.
B’: The Characteristics of the Sinful Heart/Emotions/Feelings.