In the Torah, the Lord called the Jewish people to love their neighbors as themselves, expressed most clearly in Leviticus 19:18: “Do not seek revenge or bear a grudge against anyone among your people, but love your neighbor as yourself. I am the LORD.”
In the New Testament, Jesus reiterated that this was the second greatest of all the commandments, superseded only by the commandment to love the Lord Himself with all of our heart, soul, mind, and strength. Jesus actually said that, “All the Law and the Prophets hang on these two commandments.” (Matthew 22:34-40)
But who, exactly, is our neighbor?...