Shavuot and Moshiach
From Torah4blind.org

Three people in Jewish history are particularly associated with Shavuot: Moshe, King David and the Baal Shem Tov. And these three great leaders were also intimately connected with Moshiach and the Redemption.

As the one through whom the Torah was given to the Jewish people, Moshe is intimately connected with Shavuot. The Torah, in some places, is even referred to as Torat Moshe (The Torah of Moshe). Moshiach will be so like Moshe in his leadership qualities, humility and Torah scholarship that our Sages even stated, "Moshe is the first redeemer and the last redeemer."

Shavuot is the birthday and anniversary of the passing of King David. One of the functions of Moshiach is that he will restore the Davidic dynasty, for Moshiach will be a descendant of King David, a human king.

Finally, we come to the Baal Shem Tov. The Baal Shem Tov, too, passed away on Shavuot. In a famous letter to his brother-in-law, the Baal Shem Tov described a spiritual "journey" when he visited the chamber of Moshiach. He asked Moshiach, "Master, when will you come?" Moshiach replied, "When your wellsprings—your teachings—will spread forth to the outside."

The Baal Shem Tov's teachings--Chasidus--were recorded and expounded upon by his various disciples. They are a foretaste of the new and deeper revelations of Torah that we are promised will be revealed and taught by Moshiach himself.

This year on Shavuot, when all Jews, young and old, gather in our synagogues to reexperience the giving of the Torah on Mount Sinai, let us also reconnect with the essence of the holiday and cry out for the ultimate revelation of the Torah and G‑d through Moshiach.