Adam and Eve knew the joy of welcoming children into a world that God had created good. Cain became a farmer, cultivating the ground. Abel became a shepherd, caring for his flocks. They shared the same parents. They grew up under the same roof. They undoubtedly heard the same stories about the Garden of Eden, the serpent, God's judgment, and God's promise of redemption. Yet as they grew, something very different was taking place within their hearts.