Hands and arms in constant motion, voice rising and falling by the word, Rabbi Yosef Bart engaged his class in an animated discussion on the age-old question of the chicken and the egg. “Which came first?“ he said, lowering his voice and giving a shrug of the shoulders that suggested room for discussion. Before the four students could say a word, Bart piped in a loud, certain-as-life-itself answer: “The chicken, of course. God said he created birds. He didn’t say eggs, he said birds.“