Read the excerpt from Black Boy. That day a quarter of a century later when I visited him on the plantation—he was standing against the sky, smiling toothlessly, his hair whitened, his body bent, his eyes glazed with dim recollection, his fearsome aspect of twenty-five years ago gone forever from him—I was overwhelmed to realize that he could never understand me or the scalding experiences that had swept me beyond his life and into an area of living that he could never know. What does the excerpt most clearly demonstrate about Wright's attitude toward his father?