“And let railing,” says he, “be put away from you.” Observe the progress of mischief. Bitterness produces wrath, wrath anger, anger clamor, clamor railing, that is, revilings; next from evil-speaking it goes on to blows, from blows to wounds, from wounds to death. Paul, however, did not wish to mention any of these, but only this, “let this,” says he, “be put away from you, with all malice.” What is “with all malice”? It ends with this. For there are some, like those dogs that bite secretly, which do not bark at all at those that come near them, nor are angry, but which fawn, and display a gentle aspect; but when they catch us off our guard, will fix their teeth in us.
These are more dangerous than those that take up open enmity. Now since there are men too that are dogs, who neither cry out, nor fly in a passion, nor threaten us when they are offended, yet in secret are weaving plots, and contriving ten thousand mischiefs, and revenging themselves not in words but in deeds; he hints at these. Let those things be put away from you, says he, “with all malice.” Do not spare your words, and then revenge yourself in acts. My purpose in chastising my tongue and curtailing its clamor, is to prevent its kindling up a more violent blaze.
But if you without any clamor art doing the same thing, and art cherishing the fire and the live coals within, where is the good of your silence? Do you not know that those conflagrations are the most destructive of all which are fed within, and appear not to those that are without? And that those wounds are the deadliest which never break out to the surface; and those fevers the worst which burn up the vitals? So also is this anger the most dangerous that preys upon the soul.
But let this too be put away from you, says he, “with all malice,” of every kind and degree, great and little. Let us then hearken to him, let us cast out all “bitterness and all malice,” that we “grieve not the Holy Spirit.” Let us destroy all bitterness; let us cut it up by the very roots. Nothing good, nothing healthful, can ever come from a bitter soul; nothing but misfortunes, nothing but tears, nothing but weeping and wailing. Do ye not see those beasts that roar or cry out, how we turn away from them; the lion, for instance, and the bear?
But not so from the sheep; for there is no roaring, but a mild and gentle voice. And so again with musical instruments, those which are loud and harsh are the most unpleasant to the ear, such as the drum and trumpet; whereas those which are not so, but are soothing, these are pleasant, as the flute and lyre and pipe. Let us then prepare our soul so as never to cry aloud, and thus shall we be enabled also to gain the mastery over our anger. And when we have cut out this, we ourselves shall be the first to enjoy the calm, and we shall sail into that peaceful haven, which God grant we may all attain, in Jesus Christ our Lord, with whom, together with the Holy Ghost, be unto the Father, glory, might, and honor, now, and ever, and throughout all ages. Amen.
Source: Homilies on Ephesians (New Advent)