Ezechiel 18:7

But there are myriads of injunctions to be found, whose aim is the attainment of what is good, and the avoidance of what is evil. “For there is no peace to the wicked, saith the Lord .” Wherefore by Solomon He commands the children to beware: “My son, let not sinners deceive thee, and go not after their ways; and go not, if they entice thee, saying, Come with us, share with us in innocent blood, and let us hide unjustly the righteous man in the earth; let us put him out of sight, all alive as he is into Hades.” This is accordingly likewise a prediction concerning the Lord’s passion. And by Ezekiel, the life supplies commandments: “The soul that sinneth shall die; but he that doeth righteousness shall be righteous. …

Further, Plato the philosopher says that the end is twofold: that which is communicable, and exists first in the ideal forms themselves, which he also calls “the good;” and that which partakes of it, and receives its likeness from it, as is the case in the men who appropriate virtue and true philosophy. Wherefore also Cleanthes, in the second book, On Pleasure , says that Socrates everywhere teaches that the just man and the happy are one and the same, and execrated the first man who separated the just from the useful, as having done an impious thing. For those are in truth impious who separate the useful from that which is right according to the law. Plato himself says that happiness ( εὐδαιμονία ) is to possess rightly the dæmon, and that the ruling faculty of the soul is called the dæmon; and he terms happiness ( εὐδαιμονία ) the most perfect and complete good. …

“But I say unto you which hear” (displaying here that old injunction, of the Creator: “Speak to the ears of those who lend them to you”), “Love your enemies, and bless those which hate you, and pray for them which calumniate you.” These commands the Creator included in one precept by His prophet Isaiah: “Say, Ye are our brethren, to those who hate you.” For if they who are our enemies, and hate us, and speak evil of us, and calumniate us, are to be called our brethren, surely He did in effect bid us bless them that hate us, and pray for them who calumniate us, when He instructed us to reckon them as brethren. …

In the thirteenth Psalm: “He that hath not given his money upon usury, and has not received gifts concerning the innocent. He who doeth these things shall not be moved for ever.” Also in Ezekiel: “But the man who will be righteous, shall not oppress a man, and shall return the pledge of the debtor, and shall not commit rapine, and shall give his bread to the hungry, and shall cover the naked, and shall not give his money for usury.” Also in Deuteronomy: “Thou shalt not lend to thy brother with usury of money, and with usury of victuals.”

On account of this relationship of brotherhood, God teaches us never to do evil, but always good. And He also prescribes in what this doing good consists: in affording aid to those who are oppressed and in difficulty, and in bestowing food on those who are destitute. For God, since He is kind, wished us to be a social animal. Therefore, in the case of other men, we ought to think of ourselves. We do not deserve to be set free in our own dangers, if we do not succour others; we do not deserve assistance, if we refuse to render it. There are no precepts of philosophers to this purport, inasmuch as they, being captivated by the appearance of false virtue, have taken away mercy from man, and while they wish to heal, have corrupted. …