The Testimony: An Address Delivered at the Schoolhouse of the Hebrew Education Society of Philadelphia This pamphlet contains the text of an address delivered by Isaac Leeser at the first opening of the Hebrew Education Society's schoolhouse in Philadelphia on April 6, 1851 (4 Nisan 5611). The address emphasizes the importance of Jewish education in maintaining religious observance and combating assimilation. Leeser discusses the historical significance of preserving Jewish traditions and the role of education in fostering religious piety and national identity. He also addresses concerns about the quality of education offered by the new school, assuring parents that it will provide both secular and religious instruction, and that it will be accessible to children of all socioeconomic backgrounds.