as they perpare the campfire for dinner , lennie remarks that he likes his bean with ketchup, sending George into rage. how is tirade revelatory

George's tirade reveals his frustration of having to take care of Lennie. George considers how much easier his life would be without having to look after a man-child that gets him into trouble. George, however, is merely venting. Lennie is actually central to George's mental well being. George needs Lennie's companionship as much as Lennie needs George to look after him.