"If we had merely been sold as male and female slaves, I would have kept quiet, because no such distress would justify disturbing the king." NIV translation
Esther continues to explain to the king that she would have kept quiet it if wasn't a matter of life and death. You can almost feel the king getting angry as he thinks about someone selling the queen into slavery. This is also the way that God feels when his children are attacked by the devil and his demons.
"King Xerxes asked Queen Esther, 'Who is he? Where is the man who has dared to do such a thing?'" NIV translation
The king was angry at the thought that someone would have the nerve to do such a thing to the woman that he loves.
This is kind of the same way with us and God in that He does not like anyone messing with His children. We can walk confidently in Christ because we understand that we, just like the queen, are royalty as children of God. If God is for us then who can stand against us?
"Esther said, 'The adversary and enemy is this vile Haman.' Then Haman was terrified before the king and queen." NIV translation
Imagine how Haman's mind must have been racing as he hears Esther basically pronounce the death sentence for him. He had to have known when the words came out of her mouth that his fate was sealed. He sowed hatred in condemning the Jews and now he will reap hatred from the king. If we are in Christ, we can sow love and also receive God's love. For those who do not know Christ, they cannot know love and so it is not possible to sow love. Therefore, at the judgment, they will receive the wrath of God.
"The king got up in a rage, left his wine and went out into the palace garden. But Haman, realizing that the king had already decided his fate, stayed behind to beg Queen Esther for his life." NIV translation
The king went out to the garden to calm down as he was so mad that he had been betrayed by one of his closest advisors. Haman knew that his mind was made up and that the only way to save his life was for Esther to talk to the king on his behalf. He stayed behind to beg her to do so. We, like Haman, were condemned men because of our sinful nature and our only hope was to ask Jesus Christ to forgive us of our sins.