Macbeth speaks his final speech when the joined forces of Malcolm and Macduff are coming to his castle to defeat him. In a brief moment, we can see an echo of Macbeth's former self when he hears the cry of a woman, and he thinks to himself that once upon a time he would be scared of such a cry and maybe stop fighting, but that time is long gone. He has committed so many atrocities that nothing can startle him now.