Origen
Catena Aurea · Matthäusevangelium 22
But when the Pharisees had heard that he had put the Sadducees to silence, they were gathered together. Then one of them, which was a Lawyer, asked him a question, tempting him, and saying, Master, which is the great commandment in the Law? Jesus said unto him, Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind. This is the first and great commandment. And the second is like unto it, Thou shalt love thy neighbour as thyself. On these two commandments hang all the Law and the Prophets.
Or otherwise; With all thy heart, that is, in all recollection, act, thought; with all thy soul, to be ready, that is, to lay it down for God’s religion; with all thy mind, bringing forth nothing but what is of God. And consider whether you cannot thus take the heart of the understanding, by which we contemplate things intellectual, and the mind of that by which we utter thoughts, walking as it were with the mind through each expression, and uttering it. If the Lord had given no answer to the Pharisee who thustempted Him, we should have judged that there was no commandment greater than the rest. But when the Lord adds, This is the first and great commandment, we learn how we ought to think of the commandments, that there is a great one, and that there are less down to the least. And the Lord says not only that it is a great, but that it is the first commandment, not in order of Scripture, but in supremacy of value. They only take upon them the greatness and supremacy of this precept, who not only love the Lord their God, but add these three conditions. Nor did He only teach the first and great commandment, but added that there was a second like unto the first, Thou shall love thy neighbour as thyself. But if Whoso loveth iniquity hath hated his own soul, (Ps. 11:5.) it is manifest that he does not love his neighbour as himself, when he does not love himself.