Ps 33:14

“The person of peace ought to seek and follow peace; he who knows and loves the bond of charity ought to restrain his tongue from the evil of dissension. Among his divine commands and salutary instructions the Lord now very near his passion added the following: "Peace I leave you, my peace I give you." This inheritance he gave us, all the gifts and rewards of his promise he assured us in the conservation of peace. If we are heirs of Christ, let us remain in the peace of Christ; if we are children of God, we ought to be peacemakers. "Blessed," he said, "are the peacemakers, for they shall be called the children of God." The children of God should be peacemakers, gentle in heart, simple in speech, harmonious in affection, clinging to one another faithfully in the bonds of unanimity.”

“Mere abstinence from evil is not a characteristic of a perfect person, but for one recently instructed in basic principles it is fitting to turn aside from the impulse to evil and, being delivered from the habits of a depraved life as from a bad road, to pursue the performance of good. In fact, it is impossible to cling to the good unless one has withdrawn entirely and turned away from the evil, just as it is impossible to repair one's health unless one rids himself of the disease, or for one who has not completely checked a chill to be in a state of warmth; for, these are inadmissible to each other. So also, it is proper for one who intends to live a good life to depart from all connection with evil.… Yet, as long as we were bound to the flesh, we were yoked to many things that also troubled us. Seek, then, after peace, a release from the troubles of this world; possess a calm mind, a tranquil and unconfused state of soul that is neither agitated by the passions nor drawn aside by false doctrines that challenge by their persuasiveness to an assent, in order that you may obtain "the peace of God that surpasses all understanding and guards your heart."”

“But what is, "Depart from evil"? (ver. 14). It is little that thou injure none, murder none, steal not, commit not adultery, do no wrong, speak no false witness; "Depart from evil." When thou hast departed, thou sayest, Now I am safe, I have done all, I shall have life, I shall see good days. Not only saith he, "Depart from evil," but also, "and do good." It is nothing that thou spoil not: clothe the naked. If thou hast not spoiled, thou hast declined from evil; but thou wilt not do good, except thou receive the stranger into thine house. So then depart from evil, as to do good. "Seek peace, and ensue it." He hath not said, Thou shalt have peace here; seek it, and ensue it. Whither shall I ensue it? Whither it hath gone before. For the Lord is our peace, hath risen again, and hath ascended into Heaven. "Seek peace, and ensue it;" because when thou also hast risen, this mortal shall be changed, and thou shall embrace peace there where no man shall trouble thee. For there is perfect peace, where thou wilt not hunger. ...”

“The peaceable person entertains peace toward everyone, not purloining the neighbor's property furtively, not committing homicide, not undermining marriages, not speaking evil, not doing evil, doing favors, showing respect, sharing, lending support, sharing dangers and struggles—such is unalloyed love and genuine friendship.”

“The commandments which Jesus spake unto him, "Thou shalt not kill, Thou shalt not commit adultery, Thou shalt not steal, and Thou shalt not bear false witness," agree with the words of David, who said, "Depart from evil, and do good"; and with those which Paul spake, "Let not wickedness overcome you." And the commandments, "Honour thy father and thy mother," and, "That which is hateful unto thee, do not unto thy neighbour," agree with, "Do ye good," and, "Overcome evil with good."”

“To see good days it is insufficient simply to abstain from evil acts; our compassion must also compel us to perform good works. The first stage of virtue is not to covet what belongs to others, but then the higher stage is not to hold back our own possessions from those in need. In the first stage, we escape blame, but in the second we win the palm of compassion.”

“Likewise, in deed he shows two things to be done. For a person ought to order his life, first with regard to himself; and with regard to this he says, "Turn away." Second, with regard to neighbor; and with regard to this he says, "Seek," etc. Concerning the first he does two things, according to the diverse parts of justice, which are namely turning away from evil and doing good. The second is at "And do good." He says therefore, "Turn away from evil": Sir. 7: "Do not do evil things," etc. To turn away from evil is not meritorious if "turning away" denotes only a negation; for by this, namely by not doing evil, one indeed avoids the punishment that one would have incurred by committing it; yet life is not acquired on this account. And therefore, understood in this way, not doing evil is not meritorious, so long as such a will is not informed by charity, so as to turn from evil for God's sake. "And do good": Is. 1: "Learn to do well." Second, with regard to neighbor he says, "Seek peace," etc. But it happens sometimes that you have a neighbor who attacks you, and then it is your part to seek peace; and therefore he says, "Seek peace": Rom. 12: "If it be possible, as much as is in you, have peace with all men." But sometimes it happens that you have someone who seeks peace from you, and then it is your part to pursue it; hence he says, "And pursue it." Or he speaks of the peace that one ought to have within oneself; and this, he says, you should seek in this life. But it is not fully had, because the flesh desires against the spirit, and the spirit against the flesh, Gal. 5. He says moreover, "And pursue it," so that you may have more of it, although it is not perfect here, but in the future, where the people shall sit in the beauty of peace, Is. 32. Or, "Seek peace," that is, Christ, who is our peace: Eph. 2; "And pursue it": Eccl. 2: "Who is the man who can follow the king his maker?"”