A rebellious heart is not instructable.  This is why the Lord asked the first question.<p>If Cain had really wanted to please the Lord, he would have asked Him what he needed to do to please Him rather than getting angry.<p>The second question about Cain^s fallen countenance was the Lord^s attempt to point out to Cain the bitterness, emptiness and unhappiness that comes from SelfWorship.  Cain^s pride was hurt.