“Israel camped there by the mountain.” Exodus 19:2. Rashi, the wise teacher who teaches Torah to every Jew, hides deep treasures in his simple commentary. When Pharaoh and his entire army came chasing after us, the Torah writes only that “Pharaoh approached.” So Rashi explains that they came with one heart, as though they were a single person. First the heart, then the person. Their hearts were driven by the same greed, so they acted as a single person. When we camped before Mount Sinai, the Torah refers to the entire nation in the singular—unlike all other...