“The second commandment
Is like it.
‘You shall love
On these two commandments
Hang all the law
And the prophets.’”
δευτέρα ὁμοία αὐτῇ Ἀγαπήσεις τὸν πλησίον σου ὡς σεαυτόν.
ἐν ταύταις ταῖς δυσὶν ἐντολαῖς ὅλος ὁ νόμος κρέμαται καὶ οἱ προφῆται.
There is something similar in Mark, chapter 12:31, almost word for word, and Luke, chapter 20:27, but in a more condensed version. This was based on Leviticus, chapter 19:18. A further explanation of the commandments in Leviticus ends with this basic fundamental concept of love your neighbor as yourself, which became the cornerstone of Judaism and Christianity. They were not to hate in their heart anyone of their relatives. They should reprove their neighbor, but not take vengeance on him. They were not to bear a grudge, because they should love them as themselves. Jesus replied that the 2nd commandment was like the 1st one (δευτέρα ὁμοία αὐτῇ) since it was about love. Not only were they to love God, but they were to love their neighbors as themselves (Ἀγαπήσεις τὸν πλησίον σου ὡς σεαυτόν). All the commandments of the law (ὅλος ὁ νόμος) and the prophets (καὶ οἱ προφῆται) hang (κρέμαται) on these two commandments (ἐν ταύταις ταῖς δυσὶν ἐντολαῖς).