Ambrosiaster : To the servant of God, all things appear to have some aspect of good. This does not stain his purity in any respect. What use is it to have a clean life and a foul mouth? The Lord says that everyone will be justified or condemned by his own words. One who speaks ill cannot be thought to live well. Many vices are implied in speaking ill of another, whether this means talking basely or disparaging the good of another or telling deceitful tales or lies. All these are repugnant. But good and sober reports are gratifying to those who hear them. They set an example. God is glorified in such words, which build up faith in Christ. — EPISTLE TO THE Ephesians 4.29 Clement of Alexandria : From filthy speaking we ourselves must entirely abstain, and stop the mouths of those who practise it by stern looks and averting the face, and by what we call making a mock of one: often also by a harsher mode of speech. "For what proceedeth out of the mouth," He says, "defileth a man,"-shows him to be unclean, and heathenish, and untrained, and licentious, and not select, and proper, and honourable, and temperate. And as a similar rule holds with regard to hearing and seeing in the case of what is obscene, the divine Instructor, following the same course with both, arrays those children who are engaged in the struggle in words of modesty, as ear-guards, so that the pulsation of fornication may not penetrate to the bruising of the soul; and He directs the eyes to the sight of what is honourable, saying that it is better to make a slip with the feet than with the eyes. This filthy speaking the apostle beats off, saying, "Let no corrupt communication proceed out of your mouth, but what is good." And again, "As becometh saints, let not filthiness be named among you, nor foolish talking, nor jesting, which things are not seemly, but rather giving of thanks." And if "he that calls his brother a fool be in danger of the judgment," what shall we pronounce regarding him who speaks what is foolish? Is it not written respecting such: "Whosoever shall speak an idle word, shall give an account to the Lord in the day of judgment?" And again, "By thy speech thou shalt be justified," He says, "and by thy speech thou shalt be condemned." What, then, are the salutary ear-guards, and what the regulations for slippery eyes? Conversations with the righteous, preoccupying and forearming the ears against those that would lead away from the truth. — The Instructor Book 2 Cyprian : This has been done, although our mind and intention had been already plainly declared to the brethren, and to the whole of the people in this place, when, having received letters lately from both parties, we read your letters, and intimated your ordination to the episcopate, in the ears of every one. Moreover, remembering the common honour, and having respect for the sacerdotal gravity and sanctity, we repudiated those things which from the other party had been heaped together with bitter virulence into a document transmitted to us; alike considering and weighing, that in so great and so religious an assembly of brethren, in which God's priests were sitting together, and His altar was set, they ought neither to be read nor to be heard. For those things should not easily be put forward, nor carelessly and rudely published, which may move a scandal by means of a quarrelsome pen in the minds of the hearers, and confuse brethren, who are placed far apart and dwelling across the sea, with uncertain opinions. Let those beware, who, obeying either their own rage or lust, and unmindful of the divine law and holiness, rejoice to throw abroad in the meantime things which they cannot prove; and although they may not be successful in destroying and ruining innocence, are satisfied with scattering stains upon it with lying reports and false rumours. Assuredly, we should exert ourselves, as it is fitting for prelates and priests to do, that such things, when they are written by any, should be repudiated as far as we are concerned. For otherwise, what will become of that which we learn and which we declare to be laid down in Scripture: "Keep thy tongue from evil, and thy lips from speaking guile? " And elsewhere: "Thy mouth abounded in malice, and thy tongue embraced deceit. Thou satest and spakest against thy brother, and slanderedst thine own mother's son." Also whist the apostle says: "Let no corrupt communication proceed from thy mouth, but that which is good to the edifying of faith, that it may minister grace unto the hearers." Further, we show what the right course of conduct to pursue is, if, when such things are written by the calumnious temerity of some, we do not allow them to be read among us: and therefore, dearest brother, when such letters came to me against you, even though they were the letters of your co-presbyter sitting with you, as they breathed a tone of religious simplicity, and did not echo with any barkings of curses and revilings, I ordered them to be read to the clergy and the people. — Epistle XLI Cyprian : That we must not curse. In Exodus: "Thou shalt not curse nor speak ill of the ruler of thy people." Also in the thirty-third Psalm: "Who is the man who desires life, and loveth to see good days? Restrain thy tongue from evil, and thy lips that they speak no guile." Of this same thing in Leviticus: "And the Lord spoke to Moses, saying, Bring forth him who hath cursed abroad outside the camp; and all who heard him shall place their hands upon his head, and all the assembly of the children of Israel shall stone him." Of this same thing in Paul's Epistle to the Ephesians: "Let no evil discourse proceed out of your mouth, but that which is good for the edification of faith, that it may give grace to the hearers." Of this same thing to the Romans: "Blessing, and not cursing." Of this same thing in the Gospel according to Matthew: "He who shall say to his brother, Thou fool! shall be liable to the Gehenna of fire." Of this same matter, according to the same Matthew: "But I say unto you, That every idle word which men shall speak, they shall give account for it in the day of judgment. For by thy words thou shalt be justified, and by thy words thou shalt be condemned." — Treatise XII. Three Books of Testimonies Against the Jews. Desert Fathers : A hermit said, 'A monk ought not to listen to disparagement; he ought not to be disparaging, and he ought not to be scornful.' — The Desert Fathers, Sayings of the Early Christian Monks Irenaeus : No doubt, if any one is unwilling to follow the Gospel itself, it is in his power [to reject it], but it is not expedient. For it is in man's power to disobey God, and to forfeit what is good; but [such conduct] brings no small amount of injury and mischief. And on this account Paul says, "All things are lawful to me, but all things are not expedient;" referring both to the liberty of man, in which respect "all things are lawful," God exercising no compulsion in regard to him; and [by the expression] "not expedient" pointing out that we "should not use our liberty as a cloak of maliciousness, for this is not expedient. And again he says, "Speak ye every man truth with his neighbour." And, "Let no corrupt communication proceed out of your mouth, neither filthiness, nor foolish talking, nor scurrility, which are not convenient, but rather giving of thanks." And, "For ye were sometimes darkness, but now are ye light in the Lord; walk honestly as children of the light, not in rioting and drunkenness, not in chambering and wantonness, not in anger and jealousy. And such were some of you; but ye have been washed, but ye have been sanctified in the name of our Lord." If then it were not in our power to do or not to do these things, what reason had the apostle, and much more the Lord Himself, to give us counsel to do some things, and to abstain from others? But because man is possessed of free will from the beginning, and God is possessed of free will, in whose likeness man was created, advice is always given to him to keep fast the good, which thing is done by means of obedience to God. — Against Heresies Book IV Jerome : A good word is one that serves to build upon the occasion, communicating grace to the hearers because it teaches them to pursue virtues and shun vices. An evil word is one that prompts them to sin and rather drives them headlong into disaster.… Whenever we say what is not in season or inappropriate for the context, or that which does not contribute to the good of the hearers, an evil word proceeds from our mouth.… Even if we do no direct harm, yet we are not thereby building up. We shall pay the penalty of an evil word. — Commentary on Ephesians 4:29 John Chrysostom : What is "corrupt speech"? That which is said elsewhere to be also "idle, backbiting, filthy communication, jesting, foolish talking." See ye how he is cutting up the very roots of anger? Lying, theft, unseasonable conversation. The words, however, "Let him steal no more," he does not say so much excusing them, as to pacify the injured parties, and to recommend them to be content, if they never suffer the like again. And well too does he give advice concerning conversation; inasmuch as we shall pay the penalty, not for our deeds only, but also for our words. "But such as is good," he proceeds, "for edifying, as the need may be, that it may give grace to them that hear." That is to say, What edifies thy neighbor, that only speak, not a word more. For to this end God gave thee a mouth and a tongue, that thou mightest give thanks to Him, that thou mightest build up thy neighbor. So that if thou destroy that building, better were it to be silent, and never to speak at all. For indeed the hands of the workmen, if instead of raising the walls, they should learn to pull them down, would justly deserve to be cut off. For so also saith the Psalmist; "The Lord shall cut off all flattering lips." (Ps. xii. 3.) The mouth,-this is the cause of all evil; or rather not the mouth, but they that make an evil use of it. From thence proceed insults, revilings, blasphemies, incentives to lusts, murders, adulteries, thefts, all have their origin from this. And how, you will say, do murders? Because from insult thou wilt go on to anger, from anger to blows, from blows to murder. And how, again, adultery? "Such a woman," one will say, "loves thee, she said something nice about thee." This at once unstrings thy firmness, and thus are thy passions kindled within thee. Therefore Paul said, "such as is good." Since then there is so vast a flow of words, he with good reason speaks indefinitely, charging us to use expressions of that kind, and giving us a pattern of communication. What then is this? By saying, "for edifying," either he means this, that he who hears thee may be grateful to thee: as, for instance, a brother has committed fornication; do not make a display of the offense, nor revel in it; thou wilt be doing no good to him that hears thee; rather, it is likely, thou wilt hurt him, by giving him a stimulus. Whereas, advise him what to do, and thou art conferring on him a great obligation. Discipline him how to keep silence, teach him to revile no man, and thou hast taught him his best lesson, thou wilt have conferred upon him the highest obligation. Discourse with him on contrition, on piety, on almsgiving; all these things will soften his soul, for all these things he will own his obligation. Whereas by exciting his laughter, or by filthy communication, thou wilt rather be inflaming him. Applaud the wickedness, and thou wilt overturn and ruin him. Or else he means thus, "that it may make them, the hearers, full of grace." For as sweet ointment gives grace to them that partake of it, so also does good speech. Hence it was moreover that one said, "Thy name is as ointment poured forth." (Cant. i. 3.) It caused them to exhale that sweet perfume. Thou seest that what he continually recommends, he is saying now also, charging every one according to his several ability to edify his neighbors. Thou then that givest such advice to others, how much more to thyself! — Homily on Ephesians 14 Pope Anterus : And be ye kind one to another, tender-hearted, forgiving one another, even as God in Christ hath forgiven you."