Mordechai is led through the streets on a royal horse by his arch enemy - Haman.

How did this help to save the Jewish people from the threat of annihilation?

Rav Aaron Lopiansky explains that it helped the Jewish people to realize that any situation can be reversed in a moment, if Hashem desires. This allowed them to pray with a firm belief that their salvation was possible.

Purim is a day where we allow ourselves to say dreams and aspirations that we thought were impossible and out of reach.

We listen to ourselves and realize that we can become great people - It's truly possible.

Now we can daven for its fulfillment with a belief in the impossible becoming possible.