6 Yet, although so heavy a threat is set down, there are some who so far from over-passing this righteousness, even come short of it; so far from shunning oaths, they even swear falsely; so far from avoiding an unchaste gaze, they even fall into the very act of wickedness. And all the rest of the things which are forbidden, they dare to do, as though past feeling: waiting for one thing only, the day of punishment, and the time when they are to pay the most extreme penalty for their misdoings. And this is the portion of those only who have ended their lives in wickedness. For these have reason to despair, and thenceforth to expect nothing else but punishment; whereas they who are yet here, may have power both to renew the fight and to conquer and be crowned with ease.
Despond not therefore, O man, neither put away your noble earnestness; for in truth the things are not grievous, which are enjoined. What trouble is it, I pray you, to shun an oath? What, does it cost any money? Is it sweat and hardship? It is enough to have willed only, and the whole is done.
But if you allege to me your habit; for this very reason most of all do I say, that your doing right is easy. For if you bring yourself to another habit, you had effected all.
Consider, for example, how among the Greeks, in many instances, persons lisping have entirely cured by much practice their halting tongue; while others, who were used to shrug up their shoulders in an unseemly way, and to be continually moving them, by putting a sword over them, have broken themselves of it.
For since you are not persuaded out of the Scriptures, I am compelled to shame you by them that are without. This God also did unto the Jews, when He said, “Go ye forth unto the Isles of Chittim, and send unto Kedar, and know if nations will change their gods; which yet are no gods.” And to the brutes likewise He sends us oftentimes, saying on this wise, “Go to the ant, thou sluggard, and emulate her ways:” and “go forth to the bee.”
This therefore I also now say unto you; consider the philosophers of the Greeks; and then you will know of how great punishment we are worthy, who disobey the laws of God: in that they for seemliness before men have taken exceeding pains, and you bestow not the same diligence, no, not for the things of Heaven.
But if you should reply, “Habit has a wonderful power to beguile even those who are very much in earnest:” this I likewise acknowledge; however, there is another thing which I say with it; that as it is powerful to beguile, so also is it easy to be corrected. For if you will set over yourself at home many to watch you, such as your servant, your wife, your friend, you will easily break off from the bad habits, being hard pressed and closely restrained by all. If you succeed in doing this for ten days only, you will after that no longer need any further time, but all will be secured to you, rooted anew in the firmness of the most excellent habit.
When therefore you are beginning to correct this, though you should transgress your law a first, a second, a third, a twentieth time, do not despair, but rise up again, and resume the same diligence, and you will surely prevail.
For perjury surely is no trifling mischief. If to swear is of the evil one, how great the penalty which false swearing will bring! Did ye give praise to what has been said? Nay, I want not applause, nor tumults, nor noise. One thing only do I wish, that quietly and intelligently listening, you should do what is said. This is the applause, this the panegyric for me. But if you praise what I say, but doest not what you applaud, greater is the punishment, more aggravated the accusation: and to us it is shame and ridicule. For the things here present are no dramatic spectacle; neither do ye now sit gazing on actors, that you may merely applaud. This place is a spiritual school. Wherefore also there is but one thing aimed at, duly to perform the things that have been spoken, and to show forth our obedience by our works. For then only shall we have obtained all. Since as things are, to say the truth, we have fairly given up in despair. For I have not ceased giving these admonitions either to those whom I meet in private, or in discourse with you all in common. Yet I see no advantage at all gained, but you are still clinging to the former rude beginnings, which thing is enough to fill the teacher with weariness.
See, for example, Paul himself, hardly bearing it, because his scholars were delaying a long time in their earlier lessons: “For when for the time,” says he, “ye ought to be teachers, you have need to be taught again which be the first principles of the oracles of God.”
Wherefore we too mourn and lament. And if I see you persisting, I will forbid you for the future to set foot on this sacred threshold, and partake of the immortal mysteries; as we do fornicators and adulterers, and persons charged with murder. Yea, for it is better to offer our accustomed prayers, with two or three, who keep the laws of God, than to sweep together a multitude of trangressors and corrupters of others.
Let me have no rich man, no potentate, puffing at me here, and drawing up his eyebrows; all these things are to me a fable, a shade, a dream. For no one of those who are now rich, will stand up for me there, when I am called to account and accused, as not having thoroughly vindicated the laws of God, with all due earnestness. For this, this ruined even that admirable old man, though in his own life giving no handle for blame; yet for all that, because he overlooked the treading under foot of God's laws, he was chastised with his children, and paid that grievous penalty. And if, where the absolute authority of nature was so great, he who failed to treat his own children with due firmness endured so grievous a punishment; what indulgence shall we have, freed as we are from that dominion, and yet ruining all by flattery?
In order therefore that you may not destroy both us and your own selves with us, be persuaded, I entreat you; set very many to watch over you, and call you to account, and so free yourselves from the habit of oaths; that going on orderly from thence, you may both with all facility succeed in attaining unto all other virtue, and may enjoy the good things to come; which God grant that we may all win, by the grace and love towards man of our Lord Jesus Christ, to whom be glory and might now and always, even for ever and ever. Amen.
Source: Homilies on the Gospel of St. Matthew (New Advent)