And nope, we don't source our examples from our editing service! He shows his development through these examples of his speech. For example, think of the scene where Abner tells Lennie to hold Sarty. He seems to care about, but not condone his father and his actions.
In his brief description of the two women, Faulkner focuses on their physicality and corpulence. We'll take a look right away. After running from the burning barn, he spoke of his dad in an almost heroic sense. As a result, Sarty seems to get over being mad at his dad and the two seem to have achieved a rough harmony.
Sarty has to finally realize that blood is not always thicker than water.