Son of Buzi, of the Zadokite priestly line. He was raised in Jerusalem to be a priest. He would have spent his youth training for the Temple service, expecting to offer sacrifices at age 30.
He was taken captive in 597 BC with King Jehoiachin. He was settled at Tel Abib by the River Kebar. He was a priest with no Temple, a man whose entire career was "canceled" by the national tragedy.
He was formed by Structure and Law. His mind was filled with the blueprints of the Temple and the details of the Torah. This precision would later show in his detailed visions of the New Temple.