He said unto him,
What is written in the law? how read you?
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Ambrose of Milan
AD 397
With these verses belongs the text that exposes those who seem to themselves to be experts on the law, who keep the letter of the law but disregard its spirit. He teaches that they are ignorant of the law from its very first chapter. He proves this immediately at the beginning of the law. Both the Father and the Son proclaimed and announced the sacrament of the divine incarnation, saying, “You shall love the Lord your God” and “You shall love your neighbor as yourself.” The Lord said to the lawyer, “Do this, and you shall live.” He who did not know his neighbor, because he did not believe in Christ, answered, “Who is my neighbor?” Whoever does not know Christ does not know the law either. How can he know the law when he is ignorant of the Truth, since the law proclaims the Truth? Exposition of the Gospel of Luke–.
He says, “What is written in the law? How do you read?” The lawyer repeated what is in the law. As if to punish his wickedness and reprove his malicious purpose, Christ, knowing all things, says, “You have answered correctly; do this, and you will live.” The lawyer missed his prey. He shot off the mark. His wickedness is unsuccessful. The sting of envy ceased. The net of deceit is torn. His sowing bears no fruit, and his toil gains no profit. As some ship overwhelmed by misfortune, he has suffered a bitter shipwreck. Commentary on Luke, Homily
What is the greatest and first commandment of the law? He said to him, “You shall love the Lord your God, and your neighbor as yourself.”… All this teaching is held high through the two commandments, as though by means of two wings, that is, through the love of God and of humanity. Commentary on Tatian’s Diatessaron