"Out, damned spot; out, I say. One, two,—why, then ’tis time to do’t. Hell is murky. Fie, my lord, fie, a soldier and afeard? What need we fear who knows it when none can call our power to account? Yet who would have thought the old man to have had so much blood in him?" (V.i 30-34) Lady Macbeth loses her original resolve. Completely undone by guilt, she descends into madness. I personally believe the spot represents the bloody, irreversible stain upon the fabric of her once unblemished...
