The Baal Shem Tov offered this parable for the spiritual process by which the sparks of holiness came into our physical world:
G-d deliberately caused the sparks of holiness to fall into the physical world, and then insisted that only the Jewish people, of whom it is said, “You are sons of Hashem, your G–d,” be charged with the mission of refining them.
Refining the lofty sparks of holiness trapped in the physical world is a task and privilege specifically assigned to the Jewish people.
Wow what a privilege. And how do we refine these sparks? By doing Mitzvot and living holy.