One of the teachers of the law came and heard the Sadducees arguing. He noticed that Jesus had given the Sadducees a good answer. So he asked him, "Which is the most important of all the commandments?"
Jesus answered, "Here is the most important one. Moses said, 'Israel, listen to me. The Lord is our God. The Lord is one. Love the Lord your God with all your heart and with all your soul. Love him with all your mind and with all your strength.' (Deuteronomy 6:4,5) And here is the second one. 'Love your neighbor as you love yourself.' (Leviticus 19:18) There is no commandment more important than these."