Up to his thirteenth year he received his education in the house of his father, which he then left for Posen, where he was enabled to satisfy his thirst for knowledge.
[1] Towards the end of the 18th century he obtained an appointment as teacher in a celebrated Jewish school at Dessau, where he remained until the year 1807.
During his residence there he took part with three other learned Jews in publishing a German translation of the Twelve Minor Prophets, which was accompanied by a Hebrew commentary.
[2] During his connection with this school Neumann had been on terms of the most intimate friendship with Professors Steffens and Scheibel, who were the means of converting him to Christianity.
[3] Neumann wrote, besides his Commentary on Amos, Nahum, Haggai, Zechariah, and Malachi, which was published at Dessau in 1805, under the title, ת"א ובאור קצת תרי עסר עם, a Hebrew Chrestomathy in 2 volumes (Breslau, 1821).