April 23, 1620, is the date on which Rabbi Chaim ben Joseph Vital died, according to the Julian calendar in use at the time (May 3, 1620, by the Gregorian calendar). Considered the most significant student of Rabbi Isaac "the Ari" Luria, creator of the school of Jewish mysticism known as Lurianic kabbalah, Vital and his writings ensured that the Ari's teachings were passed down to successive...