1- What does a stick turning into a snake represent?
2- The Jewish People extracted all the Sparks of Holiness that fell from Tohu into the country of Mitzrayim (Egypt). Just like the body covers over the soul, so too the Kelipah/unholiness covers the Sparks of Holiness trapped in it. Before these Sparks fell into unholiness, they were completely united with their Source in holiness. But once they became trapped in unholiness in the physical world, they become “disconnected” from their Source, until they feel as though they are separate from Hashem. The only way to free these Sparks so they can reunite with their Source in Holiness is to break the kelipah/unholiness that covers over the Sparks. This was the purpose of the Ten Plagues: to break the kelipah/unholiness of Mitzrayim so that the Sparks can reunite with Hashem.
