One of the deepest, most mystical of Chasidic thinkers, Reb Zadok Hakohen began life as an illui from a Misnagdishe family. The bizarre turn of events that brought him to the Izbitcher Rebbe is a riveting lesson in hashgacha pratis, but most incredible of all is how Reb Zadok composed his prolific and lyrical writings in near-isolation.