And therefore has the Lord said: "Judge not, that ye be not judged: for with what judgment ye shall judge, ye shall be judged." [Matthew 7:1-2] [The meaning is] not certainly that we should not find fault with sinners, nor that we should consent to those who act wickedly; but that we should not pronounce an unfair judgment on the dispensations of God, inasmuch as He has Himself made provision that all things shall turn out for good, in a way consistent with justice. For, because He knew that we would make a good use of our substance which we should possess by receiving it from another, He says, "He that hath two coats, let him impart to him that hath none; and he that hath meat, let him do likewise." [Luke 3:11] And, "For I was an hungered, and ye gave Me meat; I was thirsty, and ye gave Me drink; I was naked and ye clothed Me." [Matthew 25:35-36] And, "When thou doest thine alms, let not thy left hand know what thy right hand doeth." [Matthew 6:3] And we are proved to be righteous by whatsoever else we do well, redeeming, as it were, our property from strange hands. But thus do I say, "from strange hands," not as if the world were not God's possession, but that we have gifts of this sort, and receive them from others, in the same way as these men had them from the Egyptians who knew not God; and by means of these same do we erect in ourselves the tabernacle of God: for God dwells in those who act uprightly, as the Lord says: "Make to yourselves friends of the mammon of unrighteousness, that they, when ye shall be put to flight, may receive you into eternal tabernacles." For whatsoever we acquired from unrighteousness when we were heathen, we are proved righteous, when we have become believers, by applying it to the Lord's advantage.
Matthew 6:3
3 But when thou doest alms, let not thy left hand know what thy right hand doeth:
Commentaries
Here the Lord is not speaking literally of the hands of the human body. Hands as such cannot know, having the senses neither of seeing nor or language. Rather, "on the right hand" means righteous deeds and "on the left" signifies sinful deeds or persons. Thus we read it written in the book of Kings that "hand" means people when it says, "Do I not have ten hands in Israel?"—that is, ten tribes of Israel. Therefore, there is no doubt that "on the right hand" means "the just" and "on the left" means "sinners," according to what Solomon related: "The Lord acknowledges the divisions on the right; the perverse are those who are on the left." The Lord makes very plain the meaning of this "right" and "left" in the Gospel when he declares that the just are to be placed at the right, the sinners on the left. If something is to be accomplished according to the teaching of the Lord, then the right hand of the just must not know what the left is doing. That is, in order to labor religiously and faithfully, we should not boast in the sight of sinners and unfaithful people.
Source: TRACTATE ON MATTHEW 26.5.2-4.11
"Let not thy left hand know," saith He, "what thy right hand doeth."
Here again His enigmatical meaning is not of the hands, but He hath put the thing hyperbolically. As thus: "If it can be," saith He, "for thyself not to know it, let this be the object of thine endeavor; that, if it were possible, it may be concealed from the very hands that minister." It is not, as some say, that we should hide it from wrong-headed men, for He hath here commanded that it should be concealed from all.
Here again His enigmatical meaning is not of the hands, but He hath put the thing hyperbolically. As thus: "If it can be," saith He, "for thyself not to know it, let this be the object of thine endeavor; that, if it were possible, it may be concealed from the very hands that minister." It is not, as some say, that we should hide it from wrong-headed men, for He hath here commanded that it should be concealed from all.
(Vers. 3, 4.) But when you give alms, let not your left hand know what your right hand is doing, so that your alms may be done in secret; and your Father who sees in secret will reward you. And when you pray, you must not be like the hypocrites; for they love to stand and pray in the synagogues and at the street corners, that they may be seen by men. Truly, I say to you, they have received their reward. But when you give alms, do not let your left hand know what your right hand is doing, so that your alms may be in secret; and your Father who sees in secret will reward you.
Amen I say to you, they have received their reward. Not God's reward, but their own. For they have been praised by men, for whom they have exercised virtues.
Amen I say to you, they have received their reward. Not God's reward, but their own. For they have been praised by men, for whom they have exercised virtues.
Source: Commentary on Matthew
(ubi sup.) But according to this interpretation, it will be no fault to have a respect to pleasing the faithful; and yet we are forbidden to propose as the end of any good work the pleasing of any kind of men. Yet if you would have men to imitate your actions which may be pleasing to them, they must be done before unbelievers as well as believers. If again, according to another interpretation, we take the left hand to mean our enemy, and that our enemy should not know when we do our alms, why did the Lord Himself mercifully heal men when the Jews were standing round Him? And how too must we deal with our enemy himself according to that precept, If thy enemy hunger, feed him. (Prov. 25:21.) A third interpretation is ridiculous; that the left hand signifies the wife, and that because women are wont to be more close in the matter of expense out of the family purse, therefore the charities of the husband should be secret from the wife, for the avoiding of domestic strife. But this command is addressed to women as well as to men, what then is the left hand, from which women are bid to conceal their alms? Is the husband also the left hand of the wife? And when it is commanded such that they enrich each other with good works, it is clear that they ought not to hide their good deeds; nor is a theft to be committed to do God service. But if in any case something must needs be done covertly, from respect to the weakness of the other, though it is not unlawful, yet that we cannot suppose the wife to be intended by the left hand here is clear from the purport of the whole paragraph; no, not even such an one as he might well call left. But that which is blamed in hypocrites, namely, that they seek praise of men, this you are forbid to do; the left hand therefore seems to signify the delight in men's praise; the right hand denotes the purpose of fulfilling the divine commands. Whenever then a desire to gain honour from men mingles itself with the conscience of him that does alms, it is then the left hand knowing what the right hand, the right conscience, does. Let not the left hand know, therefore, what the right hand doeth, means, let not the desire of men's praise mingle with your conscience. But our Lord does yet more strongly forbid the left hand alone to work in us, than its mingling in the works of the right hand.
Source: Catena Aurea by Aquinas
Another hermit said: 'Unless the miller blindfolds the donkey in the treadmill, it will turn round and eat the corn. God has mercifully blindfolded us, so that we cannot see the good that we do, for then we should perhaps praise ourselves and lose our reward. That is why we are left for a time with bad thoughts, so that when we see them, we judge and condemn ourselves. Those very thoughts are the cloth that blindfolds us and prevents goodness from being seen. When a man accuses himself, he does not lose his reward.'
"But when thou givest alms, let not thy left hand know what thy right hand doeth." Using hyperbole of language, the Lord said, "If it is possible, do not even be aware yourself that you are giving alms." Or, in another sense as well, the left hand represents vainglory and the right hand, almsgiving. Let not your vainglory be aware of your almsgiving.
Source: Commentary on Matthew
Consequently, he assigns the due and fitting manner, and afterward assigns the reason, at the words That thy alms may be in secret. He says, therefore: But when thou dost alms. This is expounded in many ways. For Chrysostom says that in the book of the Canons of the Apostles it is expounded thus: by the left hand is understood the unfaithful people; by the right, the faithful. Hence, he means that nothing should be done before unbelievers.
Against this, Augustine objects that when one gives alms for glory, then it ought not to be seen even by the faithful; or if for usefulness, then it ought to be done before unbelievers: this "is properly useful," that seeing your good works they may glorify your Father (Mt 5:16).
But others expound it that by the left hand he means a wife, who sometimes impedes her husband from works of mercy. Hence, he means that even a wife should not know, and the same should be understood of anyone else. And Augustine likewise objects against this, because this precept is given to all; therefore no one should say let not thy left hand know, etc. Hence Augustine expounds it differently, and Chrysostom also, and they come to almost the same thing: they say that in Scripture, by the left hand are understood temporal goods, and by the right, spiritual ones: "In her right hand is length of days" (Pr 3:16). Hence the Lord means that it should not be done for earthly glory. Or, in another way that comes to the same thing: by the right hand are sometimes understood works of virtue, and by the left, sins — as though when a work of virtue is done, it should not be done with any sin. Chrysostom, however, gives the literal sense and says that the Lord speaks by way of excess, as if someone were to say: if it were possible, I would not want even my foot to know this.
Against this, Augustine objects that when one gives alms for glory, then it ought not to be seen even by the faithful; or if for usefulness, then it ought to be done before unbelievers: this "is properly useful," that seeing your good works they may glorify your Father (Mt 5:16).
But others expound it that by the left hand he means a wife, who sometimes impedes her husband from works of mercy. Hence, he means that even a wife should not know, and the same should be understood of anyone else. And Augustine likewise objects against this, because this precept is given to all; therefore no one should say let not thy left hand know, etc. Hence Augustine expounds it differently, and Chrysostom also, and they come to almost the same thing: they say that in Scripture, by the left hand are understood temporal goods, and by the right, spiritual ones: "In her right hand is length of days" (Pr 3:16). Hence the Lord means that it should not be done for earthly glory. Or, in another way that comes to the same thing: by the right hand are sometimes understood works of virtue, and by the left, sins — as though when a work of virtue is done, it should not be done with any sin. Chrysostom, however, gives the literal sense and says that the Lord speaks by way of excess, as if someone were to say: if it were possible, I would not want even my foot to know this.
Source: Commentary on Matthew
The Apostles in the book of the Constitutions, interpret thus; The right hand is the Christian people which is at Christ's right hand; the left hand is all the people who are on His left hand. He means then, that when a Christian does alms, the unbeliever should not see it.
Source: Catena Aurea by Aquinas
Lastly, the most serious point about them is this: that the new miser is flattered for his meanness and the old one never was. It was never called self-denial in the old miser that he lived on bones. It is called self-denial in the new millionaire if he lives on beans. A man like Dancer was never praised as a Christian saint for going in rags. A man like Rockefeller is praised as a sort of pagan stoic for his early rising or his unassuming dress. His "simple" meals, his "simple" clothes, his "simple" funeral, are all extolled as if they were creditable to him. They are disgraceful to him: exactly as disgraceful as the tatters and vermin of the old miser were disgraceful to him. To be in rags for charity would be the condition of a saint; to be in rags for money was that of a filthy old fool. Precisely in the same way, to be "simple" for charity is the state of a saint; to be "simple" for money is that of a filthy old fool. Of the two I have more respect for the old miser, gnawing bones in an attic: if he was not nearer to God, he was at least a little nearer to men. His simple life was a little more like the life of the real poor.
Source: A Miscellany of Men, The Miser and His Friends (1912)