This passage, which describes a seeming urban legend about “Sutpen’s wild negroes,” reveals a number of key details about Sutpen’s character. Though he enslaves people, the fact that he doesn’t raise his voice to these men and exercises “forbearance” rather than controlling them “by brute fear” suggests that he sees them, in some regard, as equals (though, of course, regardless of how Sutpen treats or thinks of the men, it doesn’t excuse the inhumanity of the act of owning other humans as property). In turn, this suggests that his motivation for enslaving people isn’t necessarily an underlying sense of racism and entitlement—instead, his enslaving the men seems to be yet another way in which Sutpen’s ambition (his drive to achieve respect in the culture of the pre-war South) is so great that he’s willing to forgo his personal morals and basic human decency to achieve it.