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1 Blessed is every one that feareth the LORD; that walketh in his ways. 2 For thou shalt eat the labour of thine hands: happy shalt thou be, and it shall be well with thee. 3 Thy wife shall be as a fruitful vine by the sides of thine house: thy children like olive plants round about thy table. 4 Behold, that thus shall the man be blessed that feareth the LORD. 5 The LORD shall bless thee out of Zion: and thou shalt see the good of Jerusalem all the days of thy life. 6 Yea, thou shalt see thy children's children, and peace upon Israel.
[AD 430] Augustine of Hippo on Psalms 128:1
"Blessed are all they that fear the Lord, and walk in His ways" [Psalm 128:1]. He speaks to many; but since these many are one in Christ, in the next words he speaks in the singular: "For you shall eat the labours of your fruits."...When I speak of Christians in the plural, I understand one in the One Christ. You are therefore many, and you are one; we are many, and we are one. How are we many, and yet one? Because we cling unto Him whose members we are; and since our Head is in heaven, that His members may follow....Let us therefore so hear this Psalm, as considering it to be spoken of Christ: and all of us who cling unto the Body of Christ, and have been made members of Christ, walk in the ways of the Lord; and let us fear the Lord with a chaste fear, with a fear that abides for ever....

[AD 458] Theodoret of Cyrus on Psalms 128:1
“Blessed are all who fear the Lord.” The inspired word declared blessed not the one from Abraham’s stock or from Israel’s seed but the person adorned with the fear of God. Blessed Peter also says this in the book of Acts: “In truth I grasp the fact that God shows no partiality, but in every nation the person fearing him and performing righteousness is acceptable to him.” The inspired word also gave a glimpse of the character of the fear of God, adding “those walking in his ways”: 2 “Not everyone saying to me, Lord, Lord, will enter the kingdom of heaven, but the one doing the will of my Father who is in heaven.” So it is typical of those fearing the Lord not to stray from the ways of God but to travel in them without fail.

[AD 585] Cassiodorus on Psalms 128:1
When he says, “Blessed are all who fear the Lord,” he shows that they are not blessed who fear with troubled mind the dangers of the world when temporal property is lost. For those dangers make people wretched when they torment them with groundless fear. They have no advantage, but rather a dimunition. They do not know an ascent, but rather destruction. In contrast, the fear of the Lord descends from love, is born of charity and is begotten of sweetness. A pious fear comforts the fearful and refreshes the afflicted, and does not know how to lack joy unless such fruit of fear has been put aside. About this fear it is written, “Come, children, listen to me; I will teach you the fear of the Lord.” How advantageous fear is, if children are taught by it! What sort of learning there is which is given with sweet affection!

[AD 430] Augustine of Hippo on Psalms 128:2
"You shall eat the labours of your fruits" [Psalm 128:2]. And ye, O thou, you many who are One, "You shall eat of the labours of your fruits." He seems to speak perversely to those who understand not: for he should have said, you shall eat the fruit of your labours. For many eat the fruit of their labours. They labour in the vineyard; they eat not the toil itself; but what arises from their labour they eat. They labour about trees that bear fruit: who would eat labours? But the fruit of these labours, the produce of these trees; it is this that delights the husbandman. What means, "You shall eat the labours of your fruits"? At present we have toils: the fruits will come afterwards. But since their labours themselves are not without joy, on account of the hope whereof we have a little before spoken, "Rejoicing in hope, patient in tribulation;" [Romans 12:12] at present those very labours delight us, and make us joyful in hope. If therefore our toil has been what could be eaten, and could also delight us; what will be the fruit of our labour when eaten? "They who went weeping on their way, scattering their seed," did eat their labours; with how much greater pleasure will they eat the fruits of their labours, who "shall come again with joy, bearing their sheaves with them"?..."Blessed are you, and well shall it be with you." "Blessed are you," is of the present: "well shall it be with you," is of the future. When you eat the labours of your fruits, "blessed are you;" when you have reached the fruit of your labours, "well shall it be with you." What has he said? For if it be well with you, you will be happy: and if you will be happy, you will also have all well with you. But there is a difference between hope and attainment. If hope be so sweet, how much sweeter will reality be?

[AD 430] Augustine of Hippo on Psalms 128:3
Let us now come to the words, "Your wife" [Psalm 128:3]: it is said unto Christ. His wife, therefore, is the Church: His Church, His wife, we ourselves are. "As a fruitful vineyard." But in whom is the vineyard fruitful? For we see many barren ones entering those walls; we see that many intemperate, usurious persons, slave dealers, enter these walls, and such as resort to fortune-tellers, go to enchanters and enchantresses when they have a headache. Is this the fruitfulness of the vine? Is this the fecundity of the wife? It is not. These are thorns, but the vineyard is not everywhere thorny. It has a certain fruitfulness, and is a fruitful vine; but in whom? "Upon the sides of your house." Not all are called the sides of the house. For I ask what are the sides. What shall I say? Are they walls, strong stones, as it were? If he were speaking of this bodily tenement, we should perhaps understand this by sides. We mean by the sides of the house, those who cling unto Christ....

[AD 585] Cassiodorus on Psalms 128:3
Next: “Your sons will be as olive shoots around your table.” In regards to Wisdom, the wife, rightly are the children called “sons,” not “daughters.” By the male sex strength of mind is often indicated. Or it may be because whenever this sex is named, it embraces both male and female, as elsewhere he says, “Blessed is the man who fears the Lord.” Not only is a man blessed who fears the Lord, but also a woman is blessed who fears the Lord.

[AD 430] Augustine of Hippo on Psalms 128:4
...Such children ought therefore to be "around" the Lord's "table, like olive-branches." A complete Vine it is, a great bliss: who would now refuse to be there? When you see any blasphemer have a wife, children, grandchildren, and yourself perchance without them, envy them not; discern that the promise has been fulfilled in you also, but spiritually. If therefore we have, why have we? Because we fear the Lord. "Lo, thus shall the man be blessed that fears the Lord" [Psalm 128:4]. He is the man, who is also the men; and the men are one man; because many are one, because Christ is One.

[AD 430] Augustine of Hippo on Psalms 128:5
"The Lord from out of Sion bless you: and may thou see you good things that are of Jerusalem" [Psalm 128:5]. Even to the birds was it said, "Be fruitful and multiply." [Genesis 1:22] Do you wish to hold as a great blessing what was given unto birds? Who can be ignorant, that it was given indeed by the voice of God? But use these goods, if you receive them; and rather think how you may nourish those who have been born, than that others may be born. For it is not happiness to have children, but to have good ones. Labour in the task of nourishing them, if they be born; but if they be not born, give thanks unto God....Your children are infants: thou dost caress the infants: the infants caress you: do they abide thus? But you wish they may grow, you wish that their age may increase. But consider that when one age comes, another dies. When boyhood comes, infancy dies; when youth comes, boyhood dies: when manhood comes, youth dies; when old age comes, manhood dies: when death comes, all age dies. As many successions of ages as you wish for, so many deaths of ages do you wish for. These things therefore "are" not. Finally, are children born unto you to share life with you on earth, or rather to shut you out and to succeed you? Rejoicest thou in those born to exclude you? Boys when born speak somewhat like this to their parents: "Now then, begin to think of removing hence, let us too play our parts on the stage." For the whole life of temptation in the human race is a stage play; for it is said, "Every man living is altogether vanity." Nevertheless, if we rejoice in children who will succeed us; how much must we rejoice in children with whom we shall remain, and in that Father for whom we are born, who will not die, but that we may evermore live with Him? These are the good things of Jerusalem: for they "are." And how long shall I see the good things of Jerusalem? "All your life long." If your life be for ever, you will see the good things of Jerusalem for evermore....

[AD 430] Augustine of Hippo on Psalms 128:6
For, "if in this life only," says the Apostle, "we have hope in Christ, we are of all men most miserable." [1 Corinthians 15:19] For what reason were the Martyrs condemned to beasts? What is that good? Can it be declared? By what means, or what tongue can tell it? Or what ears can hear it? That indeed, "Neither ear has heard, nor has it entered into man's heart:" [1 Corinthians 2:9] only let us love, only let us grow in grace: ye see, then, that battles are not wanting, and that we fight with our lusts. We fight outwardly with unbelieving and disobedient men; we fight inwardly with carnal suggestions and perturbations: we everywhere as yet fight....What sort of peace then is this? One from Jerusalem, for Jerusalem is interpreted, A vision of Peace. Thus then "may thou see the good things that are of Jerusalem," and that, "all your life long— and may thou see," not only your children, but, "your children's children." What means, Your children? Your works which thou here dost. Who are your children's children? The fruits of your works. You give alms: these are your children: for the sake of your alms you receive everlasting life, these are your children's children. "May you see your children's children;" and there shall be "peace upon Israel" [Psalm 128:6], the last words of the Psalm....