Matthew 6:9

As God is the common Father of all, we pray for all. Let none fear on account of their lowly station here, for all are comprised in the same heavenly nobility. … By saying, “who art in heaven,” he does not mean to insinuate that he is there only, but he wishes to withdraw the humble petitioner from earth, and fix his attention on heaven. (St. Chrysostom, hom. xx.) Other prayers are not forbidden. Jesus Christ prayed in different words (John, chap. viii.[xvii.?]), and the apostles; (Acts i, 24,) but this is an example of the simple style to be used in prayer, and is applicable to all occasions. — Hallowed be thy name, from the word holy, be held and kept holy, be glorified by us, and that not only by our words, but principally by the lives we lead. The honour and glory of God should be the principal subject of our prayers, and the ultimate end of our every action; every other thing must be subordinate to this. (Haydock)

Ver. 7,8. It appeareth from hence, and from what followeth also, that the praying here spoken of is vocal prayer; not the mere homage which the heart payeth to God, by a recognition of him as the fountain of all good, and our secret desires that God would supply our wants, but the expression of those desires by the words of our mouths, which is that duty which the Scripture generally calleth prayer, and is most certainly a duty incumbent on every person. Nor are repetitions of the same requests in prayer, or much speaking, ( that is, praying to some length of time), here absolutely forbidden: our Saviour before his passion prayed thrice for the same thing within a short compass of time, (though he did not use the same words), and, Luk 6:12, he continued all night in prayer to God. But that which is here forbidden, is an opinion of being heard for over long prayers, and using vain repetitions, as the priests of Baal continued from morning to night crying, O Baal, hear us! O Baal, hear us! as if their god had been asleep, or gone a journey, as the prophet mocketh them, 1Ki 18:26,27. Repetitions are then vain, when they are affected, and flow from some irreverent thoughts we have of God; not when they are as it were forced from the heat and intention of our affections. The like is to be said of much speaking in prayer. Long prayers are not to be condemned, but the affectation of them is, and long prayers upon pretences and designs are: but when the mind is attent, and the affections fervent, length of prayer is no fault, especially upon solemn occasions, when we come not to ask a particular mercy at the hand of God, nor for a particular person or family. But repetitions after the manner of heathens are condemned, as proceeding from irreverent thoughts of God, as if he did not know what things we have need of, or were, like a man, to be prevailed upon by a multitude of words.

When Christ had condemned what was amiss, he directs to do better; for his are reproofs of instruction. Because we know not what to pray for as we ought, he here helps our infirmities, by putting words into our mouths; after this manner therefore pray ye, v. 9. So many were the corruptions that had crept into this duty of prayer among the Jews, that Christ saw it needful to give a new directory for prayer, to show his disciples what must ordinarily be the matter and method of their prayer, which he gives in words that may very well be used as a form; as the summary or contents of the several particulars of our prayers. Not that we are tied up to the use of this form only, or of this always, as if this were necessary to the consecrating of our other prayers; we are here bid to pray after this manner, with these words, or to this effect. That in Luke differs from this; we do not find it used by the apostles; we are not here taught to pray in the name of Christ, as we are afterward; we are here taught to pray that the kingdom might come which did come when the Spirit was poured out: yet, without doubt, it is very good to use it as a form, and it is a pledge of the communion of saints, it having been used by the church in all ages, at least (says Dr. Whitby) from the third century. It is our Lord's prayer, it is of his composing, of his appointing; it is very compendious, yet very comprehensive, in compassion to our infirmities in praying. The matter is choice and necessary, the method instructive, and the expression very concise. It has much in a little, and it is requisite that we acquaint ourselves with the sense and meaning of it, for it is used acceptably no further than it is used with understanding and without vain repetition.

Verses 9-15 Christ saw it needful to show his disciples what must commonly be the matter and method of their prayer. Not that we are tied up to the use of this only, or of this always; yet, without doubt, it is very good to use it. It has much in a little; and it is used acceptably no further than it is used with understanding, and without being needlessly repeated. The petitions are six; the first three relate more expressly to God and his honour, the last three to our own concerns, both temporal and spiritual. This prayer teaches us to seek first the kingdom of God and his righteousness, and that all other things shall be added. After the things of God's glory, kingdom, and will, we pray for the needful supports and comforts of this present life. Every word here has a lesson in it. We ask for bread; that teaches us sobriety and temperance: and we ask only for bread; not for what we do not need. We ask for our bread; that teaches us honesty and industry: we do not ask for the bread of others, nor the bread of deceit, ( Proverbs 20:17 ) ; nor the bread of idleness, ( Proverbs 31:27 ) , but the bread honestly gotten. We ask for our daily bread; which teaches us constantly to depend upon Divine Providence. We beg of God to give it us; not sell it us, nor lend it us, but give it. The greatest of men must be beholden to the mercy of God for their daily bread. We pray, Give it to us. This teaches us a compassion for the poor. Also that we ought to pray with our families. We pray that God would give it us this day; which teaches us to renew the desires of our souls toward God, as the wants of our bodies are renewed. As the day comes we must pray to our heavenly Father, and reckon we could as well go a day without food, as without prayer. We are taught to hate and dread sin…