The Greatest Commandment

When the Pharisees heard that he had silenced the Sadducees, they gathered together, and one of them [a scholar of the law] tested him by asking, "Teacher, which commandment in the law is the greatest?" He said to him, "You shall love the Lord, your God, with all your heart, with all your soul, and with all your mind. This is the greatest and the first commandment. The second is like it: You shall love your neighbor as yourself. The whole law and the prophets depend on these two commandments."
Matthew 22:34-40
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The Greatest Commandment
One of the scribes, when he came forward and heard them disputing and saw how well he had answered them, asked him, "Which is the first of all the commandments?" Jesus replied, "The first is this: 'Hear, O Israel! The Lord our God is Lord alone! You shall love the Lord your God with all your heart, with all your soul, with all your mind and with all your strength.' The second is this: 'You shall love your neighbor as yourself.' There is no other commandment greater than these." The scribe said to him, "Well said, teacher. You are right in saying, 'He is One and there is no other than he.' And 'to love him with all your heart, with all your understanding, with all your strength, and to love your neighbor as yourself' is worth more than all burnt offerings and sacrifices." And when Jesus saw that [he] answered with understanding, he said to him, "You are not far from the kingdom of God." And no one dared to ask him any more questions.
Mark 12:28-34
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The Greatest Commandment
There was a scholar of the law who stood up to test him and said, "Teacher, what must I do to inherit eternal life?" Jesus said to him, "What is written in the law? How do you read it?" He said in reply, "You shall love the Lord, your God, with all your heart, with all your being, with all your strength, and with all your mind, and your neighbor as yourself." He replied to him, "You have answered correctly; do this and you will live."
Luke 10:25-28
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The New Commandment
When he had left, Jesus said, "Now is the Son of Man glorified, and God is glorified in him. [If God is glorified in him,] God will also glorify him in himself, and he will glorify him at once. My children, I will be with you only a little while longer. You will look for me, and as I told the Jews, 'Where I go you cannot come,' so now I say it to you. I give you a new commandment: love one another. As I have loved you, so you also should love one another. This is how all will know that you are my disciples, if you have love for one another.
John 13:31-35