WHAT IS MACBETH'S REACTION TO LADY MACBETH'S DEATH?

Seemingly unfazed, Macbeth comments that she should have died later, at a more appropriate time. He stops to muse on the meaning of life:

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. (23-27)