Chapter 3 has three basic points as there is a shift in the book to a more positive description from a reactive teaching model. 
I think the first point is the weakest and least helpful. The chapter opens with a description of the changes in social understanding of inter-racial marriage. This is interesting and I have just finished reading about the same thing in the book Committed. Committed, I think actually makes the argument of the changes better. When the Supreme Court decided Loving vs Virgina, overturning the Virginia ruling and allowed inter-racial marriage, 70% of the US disagreed with the ruling. But just a generation later, you will be hard pressed to find anyone that would say that inter-racial marriage should be prevented by law.
But the argument by really does not make a difference because friendship is not marriage and race is not gender. Yes, social conventions change. But the church, nor sin, is bound by societal convention.
Takeaway: Theology has to be built on the basics. Everything else, by definition is non-essential.
Takeaway: Narcissism is a serious and real issue in the modern world. May be even more important spiritually.
Takeaway: An unusual re-telling of a greek myth. 


Takeaway: More unconventional ways of looking at the world around us.