On a deeper level, however, it is quite possible that the pasuk also makes a profound distinction between man and angels. Whereas man has the potential for dynamic growth and constant spiritual progress, angels are inherently static beings. They are not beset by the temptations which challenge and threaten man. But neither are they given the opportunity for moral or ethical improvement. Only man possesses that unique gift of b'chira, the ability to choose between the sacred and the profane, between the spiritual and the mundane.
Man is given the choice either to progress and walk forward, or to regress and fall backward.
While a man is alive, it is clear that he is a m'haleich, a walker. It is he who determines his religious direction and who can realize his latent potential for spiritual growth. But in truth, argues Rav Hutner, even after the father passes away and loses that opportunity to achieve higher levels of spirituality, he may still be propelled forward, so to speak, by his son's actions. In other words, by demonstrating a commitment to Torah values, a son can help elevate his father's spiritual status in heaven because Hashem will reward the father for educating his child properly. Perhaps it is this image of walking, of hiluch, which the S'forno wishes to capture in his brief comment.