analyse the meaning of lady macbeths action of washing her hands.

Just as Macbeth lamented, "Will all great Neptune's ocean wash this blood clean from my hand?" Lady Macbeth's conscience finally catches up with her. As she stands naked in her bedroom murmuring about the whole sordid affair around killing the king, she laments, "All the perfumes of Arabia will not sweeten this little hand. Oh, Oh..." She repeatedly rubs her hands as if the blood can never be cleaned away.