The "Golden Rule"

Which of you, if his son asks for bread, will give him a stone? Or if he asks for a fish, will give him a snake? If you, then, though you are evil, know how to give good gifts to your children, how much more will your Father in heaven give good gifts to those who ask him! So in everything, do to others what you would have them do to you, for this sums up the Law and the Prophets. Mattityahu 7:9-12

Anywhere from 2-8 centuries before Jesus, the Apocryphal book of Tobit posited wisdom similar to Jesus' quote in Mt. 7: "What you hate, do to no one" (Tobit 4:15). This from a book written about the time that Romans were first experimenting with concrete and when the Hasmoneans were restoring autonomy to Judea. Similarly, in drawing a comparison between Rabbi Hillel and Rabbi Shammai, the Jewish Talmud provides this illustration:

On another occasion it happened that a certain heathen came before Shammai and said to him, 'Make me a proselyte, on condition that you teach me the whole Torah while I stand on one foot.' Thereupon he repulsed him with the builder's cubit which was in his hand. When he went before Hillel, he said to him, 'What is hateful to you, do not to your neighbour: that is the whole Torah, while the rest is the commentary thereof; go and learn it.' Shabbat 31a

Which lends an interesting historical narrative to Jesus' words in Mattityahu 22:34-39 (also Mark 12:28-34):

Hearing that Jesus had silenced the Sadducees, the Pharisees got together. One of them, an expert in the law, tested him with this question: "Teacher, which is the greatest commandment in the Law?" Jesus replied: " 'Love the Lord your God with all your heart and with all your soul and with all your mind.' This is the first and greatest commandment. And the second is like it: 'Love your neighbor as yourself.' All the Law and the Prophets hang on these two commandments."

The greatest commandment comes from the Shema - Deut 6:5; the second directly quotes Leviticus 19:18 (while paraphrasing Tobit, and summarizing Hillel's position as illustrated in the Talmud). As evidenced throughout the New Testament, Jesus masterfully uses the Text to interpret the Text. "Hillel or Shammai?" the man was asking; Jesus answers with the Text.

Sola Scriptura.