Esther chapter 3 - We see the introduction of the villain Haman, a racist and type of the Antichrist who seeks to destroy the Jews.
In the Book of Esther, Mordecai is always a picture of the Holy Spirit while Haman is also a type of the flesh – the sinful self-centred old nature.
Just as the Amalekites were the sworn enemies of Israel, and Haman the Amalekite the enemy of the Jews, so the sinful nature is the sworn enemy of the Spirit.
The conflict here between Haman and Mordecai is typical of the ongoing battle we experience as Christians – the conflict between flesh and Spirit. The battle is internal and unseen to others, but it is as real as the conflict we see here in the book of Esther.