“But when the Pharisees had heard that He had put the Sadducees to silence, they were gathered together; and one of them, which was a lawyer, asked Him a question, tempting Him, and saying, Master, which is the great commandment in the law?”

Again does the evangelist express the cause, for which they ought to have held their peace, and marks their boldness by this also. How and in what way? Because when those others were put to silence , these again assail Him. For when they ought even for this to hold their peace, they strive to urge further their former endeavors,and put forward the lawyer, not desiring to learn, but making a trial of Him, and ask, “What is the first commandment?”

For since the first commandment was this, “You shall love the Lord your God,” thinking that He would afford them some handle, as though He would amend it, for the sake of showing that Himself too was God, they propose the question. What then says Christ? Indicating from what they were led to this; from having no charity, from pining with envy, from being seized by jealousy, He says, “You shall love the Lord your God. This is the first and great commandment. And the second is like this, You shall love your neighbor as yourself.”

But wherefore “like this?” Because this makes the way for that, and by it is again established; “For every one that does evil hates the light, neither comes to the light;” and again, “The fool has said in his heart, There is no God.” And what in consequence of this? “They are corrupt, and become abominable in their ways.” And again, “The love of money is the root of all evils; which while some coveted after they have erred from the faith;” and, “He that loves me, will keep my commandment.”

But His commandments, and the sum of them, are, “You shall love the Lord your God, and your neighbor as yourself.” If therefore to love God is to love one’s neighbor, “For if you love me,” He says, “O Peter, feed my sheep,” but to love one’s neighbor works a keeping of the commandments, with reason does He say, “On these hang all the law and the prophets.“