Explicate or analyze Macbeth Act 5 Scene 3.

In Act 5 Scene 3 of Macbeth, Macbeth
receives reports that many of his soldiers and noblemen have left his side in Scotland
to join the English army.  Macbeth, however, does not care that his men have abandoned
him.  At this point, Macbeth has placed his full trust in the prophecies of the witches,
and he believes that no harm can come to him until "Birnam Wood come to Dunsinane." 
Macbeth has been blinded by his own greed and ambition so he does not consider that
there might be an alternative interpretation of the witches' prophecy.  Macbeth is
reading quite literally into the prophecy and expects that the actual trees will move
when he is in danger (he does not consider that the men will move the trees which
happens later in the play).  Further, Macbeth in this scene resolves to continue his
fight against Malcolm, Macduff, and the English army so that he does not have to face
the fact that he has made a series of bad decisions to get into a position of
power.