Galatians 5:14

Furthermore, since both circumcision and uncircumcision were attributed to the same Deity, both lost their power in Christ, by reason of the excellency of faith, of that faith concerning which it had been written, “And in His name shall the Gentiles trust?”, of that faith “which,” he says “worketh by love.” By this saying he also shows that the Creator is the source of that grace. For whether he speaks of the love which is due to God, or that which is due to one’s neighbor, in either case, the Creator’s grace is meant: for it is He who enjoins the first in these words, “Thou shalt love God with all thine heart, and with all thy soul, and with all thy strength;” and also the second in another passage: “Thou shalt love thy neighbour as thyself.” “But he that troubleth you shall have to bear judgment.” From what God? From (Marcion’s) most excellent god? But he does not execute judgment. …

You must know that in the eye of perfect, that is, Christian, modesty, (carnal) desire of one’s self (on the part of others) is not only not to be desired, but even execrated, by you: first, because the study of making personal grace (which we know to be naturally the inviter of lust) a mean of pleasing does not spring from a sound conscience: why therefore excite toward yourself that evil (passion)? why invite (that) to which you profess yourself a stranger? secondly, because we ought not to open a way to temptations, which, by their instancy, sometimes achieve (a wickedness) which God expels from them who are His; (or,) at all events, put the spirit into a thorough tumult by (presenting) a stumbling-block (to it). …

In Malachi: “Hath not one God created us? Is there not one Father of us all? Why have ye certainly deserted every one his brother?” Of this same thing according to John: “Peace I leave with you, my peace I give unto you.” Also in the same place: “This is my commandment, That ye love one another, even as I have loved you. Greater love than this has no man, than that one should lay down his life for his friends.” Also in the same place: “Blessed are the peacemakers, for they shall be called the sons of God.” Also in the same place: “Verily I say unto you, That if two of you shall agree on earth concerning everything, whatever you shall ask it shall be given you from my Father which is in heaven. …

10. No other thing, then, is chiefly to be regarded in this inquiry, which we make concerning the Trinity and concerning knowing God, except what is true love, nay, rather what is love. For that is to be called love which is true, otherwise it is desire; and so those who desire are said improperly to love, just as they who love are said improperly to desire. But this is true love, that cleaving to the truth we may live righteously, and so may despise all mortal things in comparison with the love of men, whereby we wish them to live righteously. For so we should be prepared also to die profitably for our brethren, as our Lord Jesus Christ taught us by His example. …

Fortunatus said: We say this, that the soul is compelled by contrary nature to transgress, for which transgression you maintain there is no root save the evil that dwells in us; for it is certain that apart from our bodies evil things dwell in the whole world. For not those things alone that we have in our bodies, dwell in the whole world, and are known by their names as good; an evil root also inheres. For your dignity said that this covetousness that dwells in our bodies is the root of evils; since therefore there is no desire of evil out of our bodies, from that source contrary nature dwells in the whole world. For the apostle designated that, namely covetousness, as the root of evils, not one evil which you have called the root of all evils. …

This charity, that is, this will glowing with intensest love, the apostle eulogizes with these words: “Who shall separate us from the love of Christ? shall tribulation, or distress, or persecution, or famine, or nakedness, or peril, or the sword? (As it is written, For Thy sake we are killed all the day long; we are accounted as sheep for the slaughter.) Nay, in all these things we are more than conquerors, through Him that loved us. For I am persuaded, that neither death, nor life, nor angels, nor principalities, nor things present, nor things to come, nor height, nor depth, nor any other creature, shall be able to separate us from the love of God, which is in Christ Jesus our Lord.” And in another passage he says, “And yet I show unto you a more excellent way. Though I speak with the tongues of men and of angels, and have not love, I am become as sounding brass, or a tinkling cymbal. …

10. Now who is he that fulfilleth the Law, but he that hath charity? Ask the Apostle, “Charity is the fulfilling of the Law. For all the Law is fulfilled in one word, in that which is written, Thou shalt love thy neighbour as thyself.” But the commandment of charity is twofold; “Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind. This is the great commandment. The other is like it; Thou shalt love thy neighbour as thyself.” They are the words of the Lord in the Gospel: “On these two commandments hang all the Law and the Prophets.” Without this twofold love the Law cannot be fulfilled. As long as the Law is not fulfilled, there is infirmity. Therefore he had two short, who was infirm thirty and eight years. What means, “had two short”? He did not fulfil these two commandments. …

5. For in this body of ours there is a struggle; as long as we live, we are in combat; as long as we are in combat, we are in peril; but, “in all these things we are conquerors through Him who loved us.” Our combat ye heard of just now when the Apostle was being read. “All the law,” saith he, “is fulfilled in one word, even in this, Thou shalt love thy neighbour as thyself.” This love is from the Holy Spirit. “Thou shalt love thy neighbour as thyself.” First see, if thou knowest yet how to love thyself; and then will I commit to thee the neighbour whom thou art to love as thyself. But if thou dost not yet know how to love thyself; I fear lest thou shouldest deceive thy neighbour as thyself. For if thou lovest iniquity, thou dost not love thyself. …

Ver. 14 . “For the whole law is fulfilled in one word, even in this; Thou shalt love thy neighbor as thyself.” Seeing that they made so much of the Law, he says, “If you wish to fulfill it, do not be circumcised, for it is fulfilled not in circumcision but in love.” Observe how he cannot forget his grief, but constantly touches upon what troubled him, even when launched into his moral discourse.