The second one is this; ‘You must love your neighbor the same way that you love yourself.’ There is no other commandment greater than these [i.e., love for God and man].”
Therefore, everything that you would like people to do to you, do [these things] to them also. For this is [what is required by] the Law of Moses and the prophets.
The expert in the Law of Moses said to Jesus, “Truly, Teacher, you are right in saying that God is [the only] one and that there is no other God but Him.
And the man answered Him, [Deut. 6:5], “You must love the Lord your God with all your heart, with all your soul, with all your strength and with all your mind.” And [Lev. 19:18 says], “[You must love] your neighbor just as [you love] yourself.”
And this is the [greatest] commandment [See Matt. 2:37-38] we have received from Him: [It requires] that the person who [claims to] love God should also love his brother.