Born in New York in 1940, Rabbi Fleer studied for rabbinic ordination (smicha) at the Navordoc Yeshiva in Brooklyn. He also studied at the Mirer Yeshiva and Yeshiva Torah V'daath. In 1960, he received smicha at the Yeshivat Chasidei Breslov in Jerusalem.
Rabbi Fleer is a noted Kabbalist, teacher, and story teller. He is acknowledged by the Encyclopedia Judaica (EJ Yearbook 1974) as one of today's leading authorities on Jewish Mysticism. He is also a world-renown authority on the teachings of the Hasidic master, Rebbe Nachman of Breslov, great grandson of the Baal Shem Tov.
Rabbi Fleer appeals to people who are looking for a teacher of profound intelligence, integrity and compassion: he is a man of subtle brilliance who cares very very deeply about what and who he teaches. He has a unique ability to articulate complex esoteric concepts in a clear, direct and understandable manner. His classes contain an amazing wealth of information, as well as deep insights which can be applied in daily life. They are valuable for people of any background or level of learning.
He is an original and inovative thinker. Each of his lectures is a composition, a unique synthesis of his broad knowledge of Torah, Chassidic Philosophy and Kabbalah. From his lectures one learns the immediate subject, but the experience is enriched with themes from Kaballah and the Talmud, along with his own personal and often mesmerizing insights. His teaching is profound and practical at the same time.
His talks have a particular organization. He sets out the underlying structure, then works on problematic concepts. He always knows where he is going, and at the end one can appreciate the connectedness of the sources and stories that illuminate the topic and its implications.