Hermann and Pauline Einstein were nonobservant Ashkenazi Jews. Despite his parents' secularism, the nine-year-old Albert discovered and embraced Judaism with some considerable passion, and for a time he was a dutiful, observant Jew. Following Jewish custom, his parents would invite a poor scholar to share a meal with them each week, and from the impoverished medical student Max Talmud (later Talmey) the young and impressionable Einstein learned about mathematics and science. He consumed all 21 volumes of Aaron Bernstein's joyful Popular Books on Natural Science (1880). Talmud then steered him in the direction of Immanuel Kant's Critique of Pure Reason (1781), from which he migrated to the philosophy of David Hume. From Hume, it was a relatively