A Commentary, Critical, Practical, and Explanatory on the Old and New Testaments, by Robert Jamieson, A.R. Fausset and David Brown  at sacred-texts.com
luk 11:1THE DISCIPLES TAUGHT TO PRAY. (Luk 11:1-13)
one, &c.--struck with either the matter or the manner of our Lord's prayers.
as John, &c.--From this reference to John, it is possible that disciple had not heard the Sermon on the Mount. Nothing of John's inner teaching (to his own disciples) has been preserved to us, but we may be sure he never taught his disciples to say, "Our Father."
luk 11:2(See on Mat 6:9-13).
luk 11:3day by day, &c.--an extension of the petition in Matthew for "this day's" supply, to every successive day's necessities. The closing doxology, wanting here, is wanting also in all the best and most ancient copies of Matthew's Gospel. Perhaps our Lord purposely left that part open: and as the grand Jewish doxologies were ever resounding, and passed immediately and naturally, in all their hallowed familiarity into the Christian Church, probably this prayer was never used in the Christian assemblies but in its present form, as we find it in Matthew, while in Luke it has been allowed to stand as originally uttered.
luk 11:5at midnight . . . for a friend is come--The heat in warm countries makes evening preferable to-day for travelling; but "midnight" is everywhere a most unseasonable hour of call, and for that very reason it is here selected.
luk 11:7Trouble me not--the trouble making him insensible both to the urgency of the case and the claims of friendship.
I cannot--without exertion which he would not make.
luk 11:8importunity--The word is a strong one--"shamelessness"; persisting in the face of all that seemed reasonable, and refusing to take a denial.
as many, &c.--His reluctance once overcome, all the claims of friendship and necessity are felt to the full. The sense is obvious: If the churlish and self-indulgent--deaf both to friendship and necessity--can after a positive refusal, be won over, by sheer persistency, to do all that is needed, how much more may the same determined perseverance in prayer be expected to prevail with Him whose very nature is "rich unto all that call upon Him" (Rom 10:12).
luk 11:9(See on Mat 7:7-11.)
luk 11:13the Holy Spirit--in Matthew (Mat 7:11), "good gifts"; the former, the Gift of gifts descending on the Church through Christ, and comprehending the latter.
luk 11:14BLIND AND DUMB DEMONIAC HEALED--CHARGE OF BEING IN LEAGUE WITH HELL, AND REPLY--DEMAND OF A SIGN, AND REPLY. (Luke 11:14-36)
dumb--blind also (Mat 12:22).
luk 11:20the finger of God--"the Spirit of God" (Mat 12:28); the former figuratively denoting the power of God, the latter the living Personal Agent in every exercise of it.
luk 11:21strong man--meaning Satan.
armed--pointing to all the subtle and varied methods by which he wields his dark power over men.
his palace--man whether viewed more largely or in individual souls--how significant of what men are to Satan!
in peace--undisturbed, secure in his possession.
luk 11:22a stronger than he--Christ: Glorious title, in relation to Satan!
come upon him and overcome him--sublimely expressing the Redeemer's approach, as the Seed of the woman, to bruise the Serpent's head.
taketh from him all his armour--"his panoply," "his complete armor." Vain would be the victory, were not the means of regaining his lost power wrested from him. It is this that completes the triumph and ensures the final overthrow of his kingdom. The parable that immediately follows (Luk 11:24-26) is just the reverse of this. (See on Mat 12:43-45.) In the one case, Satan is dislodged by Christ, and so finds, in all future assaults, the house preoccupied; in the other, he merely goes out and comes in again, finding the house "EMPTY" (Mat 12:44) of any rival, and all ready to welcome him back. This explains the important saying that comes in between the two parables (Luk 11:23). Neutrality in religion there is none. The absence of positive attachment to Christ involves hostility to Him.
luk 11:23gathereth . . . scattereth--referring probably to gleaners. The meaning seems to be, Whatever in religion is disconnected from Christ comes to nothing.
luk 11:27as he spake these things, a . . . woman of the company--of the multitude, the crowd. A charming little incident and profoundly instructive. With true womanly feeling, she envies the mother of such a wonderful Teacher. Well, and higher and better than she had said as much before her (Luk 1:28, Luk 1:42); and our Lord is far from condemning it. He only holds up--as "blessed rather"--the hearers and keepers of God's word; in other words, the humblest real saint of God. (See on Mat 12:49-50.) How utterly alien is this sentiment from the teaching of the Church of Rome, which would excommunicate any one of its members who dared to talk in the spirit of this glorious saying! (Also see on Mat 12:43.)
luk 11:29(See on Mat 12:39-42.)
luk 11:33(See on Mat 5:14-16; Mat 6:22-23.) But Luk 11:36 here is peculiarly vivid, expressing what pure, beautiful, broad perceptions the clarity of the inward eye imparts.
luk 11:38DENUNCIATION OF THE PHARISEES. (Luke 11:37-54)
marvelled, &c.--(See Mar 7:2-4).
luk 11:39cup and platter--remarkable example of our Lord's way of drawing the most striking illustrations of great truths from the most familiar objects and incidents of life.
luk 11:40that which is without, &c.--that is, He to whom belongs the outer life, and right to demand its subjection to Himself--is the inner man less His?
luk 11:41give alms . . . and . . . all . . . clean--a principle of immense value. As the greed of these hypocrites was one of the most prominent features of their character (Luk 16:14; Mat 23:14), our Lord bids them exemplify the opposite character, and then their outside, ruled by this, would be beautiful in the eye of God, and their meals would be eaten with clean hands, though never so fouled with the business of this worky world. (See Ecc 9:7).
luk 11:42mint . . . rue, &c.--rounding on Lev 27:30, which they interpreted rigidly. Our Lord purposely names the most trifling products of the earth, as examples of what they punctiliously exacted the tenth of.
judgment and the love of God--in Mat 23:25, "judgment, mercy, and faith." The reference is to Mic 6:6-8, whose third element of all acceptable religion, "walking humbly with God," comprehends both "love" and "faith." (See on Mar 12:29; Mar 12:32-33). The same tendency to merge greater duties in less besets us still, but it is the characteristic of hypocrites.
these ought ye, &c.--There is no need for one set of duties to jostle out another; but of the greater, our Lord says, "Ye ought to have done" them; of the lesser, only "ye ought not to leave them undone."
luk 11:43uppermost seats--(See on Luk 14:7-11).
greetings--(See on Mat 23:7-10).
luk 11:44appear not, &c.--As one might unconsciously walk over a grave concealed from view, and thus contract ceremonial defilement, so the plausible exterior of the Pharisees kept people from perceiving the pollution they contracted from coming in contact with such corrupt characters. (See Psa 5:9; Rom 3:13; a different illustration from Mat 23:27).
luk 11:46burdens grievous, &c.--referring not so much to the irksomeness of the legal rites (though they were irksome, Act 15:10), as to the heartless rigor with which they were enforced, and by men of shameless inconsistency.
luk 11:47ye build, &c.--Out of pretended respect and honor, they repaired and beautified the sepulchres of the prophets, and with whining hypocrisy said, "If we had been in the days of our fathers, we should not have been partakers with them in the blood of the prophets," while all the time they "were witnesses to themselves that they were the children of them that killed the prophets" (Mat 23:29-30); convicting themselves daily of as exact a resemblance in spirit and character to the very classes over whose deeds they pretended to mourn, as child to parent.
luk 11:49said the wisdom, &c.--a remarkable variation of the words in Mat 23:34, "Behold I SEND." As there seems plainly an allusion to ancient warnings of what God would do with so incorrigible a people, so here Christ, stepping majestically into the place of God, so to speak, says, "Now I am going to carry all that out." Could this be other than the Lord of Israel in the flesh?
luk 11:50all . . . required of this generation--As it was only in the last generation of them that "the iniquity of the Amorites was full" (Gen 15:16), and then the abominations of ages were at once completely and awfully avenged, so the iniquity of Israel was allowed to accumulate from age to age till in that generation it came to the full, and the whole collected vengeance of Heaven broke at once over its devoted head. In the first French Revolution the same awful principle was exemplified, and Christendom has not done with it yet.
prophets--in the New Testament sense (Mat 23:34; see Co1 12:28).
luk 11:51blood of Zacharias--Probably the allusion is not to any recent murder, but to Ch2 24:20-22, as the last recorded and most suitable case for illustration. And as Zacharias' last words were, "The Lord require it," so they are warned that "of that generation it should be required."
luk 11:52key of knowledge--not the key to open knowledge, but knowledge, the only key to open heaven. In Mat 23:13, they are accused of shutting heaven; here of taking away the key, which was worse. A right knowledge of God's Word is eternal life (Joh 17:3); but this they took away from the people, substituting for it their wretched traditions.
luk 11:53Exceedingly vivid and affecting. They were stung to the quick--and can we wonder?--yet had not materials for the charge they were preparing against Him.
provoke him, &c.--"to harass Him with questions."