And in their mouth was found no guile - No deceit, fraud, hypocrisy. They were sincerely and truly what they professed to be - the children of God. This is the last characteristic which is given of them as redeemed, and it is not necessary to say that this is always represented as one of the characteristics of the true children of God. See the notes on John 1:47.
For they are without fault before the throne of God - The word here rendered "without fault" - ἄμωμοι amōmoi - means, properly, "spotless, without blemish," 1-Peter 1:19. See the notes on Colossians 1:22. This cannot be construed as meaning that they were by nature pure and holy, but only that they were pure as they stood before the throne of God in heaven - "having washed their robes, and made them pure in the blood of the Lamb." See the notes on Revelation 7:14. It will be certainly true that all who stand there will be, in fact, pure, for nothing impure or unholy shall enter there, Revelation 21:27.
The "design" of this portion of the chapter was evidently to comfort those to whom the book was addressed, and, in the same way, to comfort all the children of God in times of persecution and trial. Those living in the time of John were suffering persecution, and, in the previous chapters, he had described more fearful trials yet to come on the church. In these trials, therefore, present and prospective, there was a propriety in fixing the thoughts on the final triumph of the redeemed - that glorious state in heaven where all persecution shall cease, and where all the ransomed of the Lord shall stand before his throne. What could be better suited than this view to sustain the souls of the persecuted and the sorrowful? And how often since in the history of the church in the dark times of religious declension and of persecution - has there been occasion to seek consolation in this bright view of heaven? How often in the life of each believer, when sorrows come upon him like a flood, and earthly consolation is gone, is there occasion to look to that blessed world where all the redeemed shall stand before God; where all tears shall be wiped away from every face; and where there shall be the assurance that the last pang has been endured, and that the soul is to be happy forever?

In their mouth was found no guile - When brought before kings and rulers they did not dissemble, but boldly confessed the Lord Jesus.

And in their mouth was found no guile,.... Or "a lie", as the Complutensian edition, the Alexandrian copy, the Vulgate Latin, and all the Oriental versions read; by which may be meant idolatry, for idols and idolatrous practices are often called lies, and lying vanities; see Jeremiah 16:19; and the sense is, that the superstition and idolatry of the church of Rome were not among them: or it may design false doctrine, and the meaning be, that they did not speak lies in hypocrisy, as the followers of antichrist do; nor were they given up to believe a lie, as they are: the generality of copies read, "no guile"; which is expressive of the sincerity of their words; there was no deceit nor hypocrisy in them; they did not speak with flattering lips to men, nor did they draw nigh to God with their mouths, when their hearts were far from him; they were Israelites indeed, like Nathanael, in whom was no guile; though not in so strict a sense, in which this phrase is used of Christ, 1-Peter 1:22;
for they are without fault before the throne of God; not as considered in themselves, as if they were entirely free from sin, and never committed any; though it might be true of them, that in general they were of unblemished lives and conversations, that is, not guilty of any notorious and scandalous crimes; but rather the sense is, that they were without spot or wrinkle, or any such thing, as being washed in the blood of Christ, and so cleansed from all sin, and as being justified by his righteousness from all iniquity; and so were before the throne of God, and in the sight of divine justice, unblamable and unreproveable; see , Colossians 1:22; the phrase, "before the throne of God", is left out in the Alexandrian copy, and in the Syriac, Arabic, and Ethiopic versions, and in the Complutensian edition.

guile--So ANDREAS in one copy. But A, B, C, ORIGEN, and ANDREAS in other copies read, "falsehood." Compare with English Version reading Psalm 32:2; Isaiah 53:9; John 1:47.
for--So B, Syriac, Coptic, ORIGEN, and ANDREAS read. But A and C omit.
without fault--Greek, "blameless": in respect to the sincerity of their fidelity to Him. Not absolutely, and in themselves blameless; but regarded as such on the ground of His righteousness in whom alone they trusted, and whom they faithfully served by His Spirit in them. The allusion seems to be to Psalm 15:1-2. Compare Revelation 14:1, "stood on Mount Sion."
before the throne of God--A, B, C, Syriac, Coptic, ORIGEN, and ANDREAS omit these words. The oldest Vulgate manuscript supports them.

And in their month there was found no guile - Part for the whole. Nothing untrue, unkind, unholy. They are without fault - Having preserved inviolate a virgin purity both of soul and body.