Answer: Queen Vashti personifies all of creation (the common desire). And the creation is not yet ready to attend such a big feast of the Creator or the King, because not everything has been corrected yet. Therefore, Vashti, being not ready to receive, refuses to take part in the celebration.
Then the king decides to change this desire, meaning to change the queen. He announces a beauty contest and chooses a new queen, a new desire, which in this state can still receive. Thus Esther, Mordecai’s niece, becomes the queen.
Mordecai is one of the people who lived in the king’s palace. When he was young, he uncovered a plot against the king and saved him. From the point of view of Kabbalah, this means that both in the spiritual world and in our world there are many forces for and against, positive and negative.
By the king we mean the Creator Himself. Therefore, there are forces both against Him and for Him.
The story of Purim tells how the regrouping of forces takes place in order to lead to the absolute revelation of all the governance of the Creator.
From KabTV’s “Spiritual States” 3/15/22