Pedantic point: "Sound and fury signifying nothing" isn't really Shakespeare speaking as himself, they are the words he puts into Macbeth's mouth as a comment on life the universe and everything, to indicate that he is at his lowest point and completely given over to despair. Not really particularly relevant in this context.

Life's but a walking shadow, a poor player
That struts and frets his hour upon the stage
And then is heard no more: it is a tale
Told by an idiot, full of sound and fury,
Signifying nothing.