The Great Commandment
[34] But when the Pharisees heard that he had silenced the Sadducees, they gathered together. [35] And one of them, a lawyer, asked him a question to test him. [36] “Teacher, which is the great commandment in the Law?” [37] And he said to him, “You shall love the Lord your God with all your heart and with all your soul and with all your mind. [38] This is the great and first commandment. [39] And a second is like it: You shall love your neighbor as yourself. [40] On these two commandments depend all the Law and the Prophets.”
(ESV)