This paper plots out how Walter's views on manhood develop and change, including many quotes. Also, a comparison between Mama's definition of a man and Walter's definition - citing the generational gap between the two and how their life experiences effect their perspective about a man's role in the world.
From the Paper:
"How does one define what it means to be a man? Is there one single step or moment in which a boy moves into manhood, leaving behind his childish ways and moving forward into the maturity of manhood? Many cultures have formal initiations or festivals celebrating a boy's entrance into manhood."