Sabbatai Zevi
He studied under Joseph Trani of Constantinople (died 1644), and under Mordecai, a German kabbalist. From the latter he probably derived the touch of mysticism which, combined with cunning and great intelligence, made him the most suitable representative of Sabbatai Zevi. Yachini persuaded Sabbatai Zevi, who at that time was convinced that he was the Messiah but was timid and fearful of proclaiming himself, boldly to declare his claims. It was in Constantinople, about 1653, that Sabbatai Zevi became acquainted with Yachini, who, on account of his learning and oratorical powers, enjoyed a great reputation in his native town. He is described by contemporaries as the best preacher of his day.