Why does Rayber purchase new clothing for Tarwater in the novel, The Violent Bear It Away?

New clothes are purchased by Rayber for Tarwater, with two intents. First, Rayber wishes for Tarwater to have a decent set of clothes, and to dispense with the grubby old overalls he wears, which are a part of his life in the backwoods. Second, Rayber believes that a new set of clothes will hold true to the old maxim that clothes make the man, thus giving Tarwater a fresh lease on life –a new, and better life.