Books · 1932
Man knows so little about his fellows. In his eyes all men or women act upon what he believes would motivate him if he were mad enough to do what the other man or woman is doing.
— William Faulkner · Light in August

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
This describes how poorly people understand each other. We judge someone's strange behavior by imagining what would push us to act that way if we lost our minds. It's less empathy than projection dressed up as insight.
Context reviewed