We would be able neither to remember nor to reflect nor to compare nor to think, indeed, we would not even be the person who we were a moment ago, if our concepts were divided among many and were not to be encountered somewhere together in their most exact combination.

The Berlin of the day—the day of Frederick the Great—was in a moral and intellectual ferment. The interest caused by these actions led Mendelssohn to publish his most important contribution to the problems connected with the position of Judaism in a Gentile world. His sons were: Joseph (founder of the Mendelssohn banking house and a friend and benefactor of Alexander von Humboldt) Abraham (who married Lea Salomon and was the father of Fanny and Felix Mendelssohn); and Nathan (a mechanical engineer of considerable repute).

banking house. He also establiMoses Mendelssohnd himself as an important figure in the Berlin textile industry which was the foundation of his family's wealth.