Rebbe Nachman of Breslev
Rabbi Nachman of Breslev was the founder of the Breslov Hasidim and a great grandson of the Bal Shem Tov. In his relatively short life of 38 years, Rebbe Nachman reached very high spiritual levels and gave over many powerful and inspirational teachings. Rebbe Nachman is buried in the city of Uman, Ukraine and thousands of Jews flock to his grave site each year for the Rosh Hashanah Kibutz. His teaching are considered amongst the most spiritual reviving lessons of today's age and have gained much publicity in recent years. He was also a descendant of the Tana Rabbi Yochanan Hasandlar.
It is a great Mitzvah to always be happy