3. Let Jehovah cut off all flattering tips, and the tongue that speaketh great [or proud] things: 4. Those who have said we will be strengthened by our tongues; our lips are in our own power: who is lord over us?
To his complaint in the preceding verse he now subjoins an imprecation, that God would cut off deceitful tongues. It is uncertain whether he wishes that deceitful men may be utterly destroyed, or only that the means of doing mischief may be taken from them; but the scope of the passage leads us rather to adopt the first sense, and to view David as desiring that God, by some means or other, would remove that plague out of the way. As he makes no mention of malice, while he inveighs so vehemently against their envenomed tongues, we hence conclude, that he had suffered much more injury from the latter than from the former; and certainly falsehood and calumnies are more deadly than swords and all other kind of weapons. From the second clause of the third verse it appears more clearly what kind of flatterers they were of whom mention was made in the preceding verse: The tongue that speaketh great or proud things. Some flatter in a slavish and fulsome manner, declaring that they are ready to do and suffer any thing which they possibly can for our benefit. But David here speaks of another kind of flatterers, namely, those who in flattering proudly boast of what they will accomplish, and mingle base effrontery and threatening with their deceitful arts. He does not, therefore, speak of the herd of mean conceited persons among the common people who make a trade of flattering, that they may live at other people's expense; but he points his imprecation against the great calumniators of the court to which he was attached, who not only insinuated themselves by gentle arts, but also lied designedly in boasting of themselves, and in the big and haughty discourse with which they overwhelmed the poor and simple.
This the Psalmist confirms more fully in the following verse: Who have said, we will be strengthened by our tongues Those must be possessed of great authority who think that, in the very falsehood to which they are addicted, they have enough of strength to accomplish their purposes, and to protect themselves. It is the utmost height of wickedness for persons to break out into such presumption, that they scruple not to overthrow all law and equity by their arrogant and boasting language; for, in doing this, it is just as if they openly declared war against God himself. Some read, we will strengthen our tongues. This reading is passable, in so far as the sense is concerned, but it scarcely agrees with the rules of grammar, because the letter l, lamed, is added. Moreover, the sense which is more suitable is this: that the wicked persons spoken of being armed with their tongues, go beyond all bounds, and think they can accomplish by this means whatever they please; just as this set of men so deform every thing with their calumnies, that they would almost cover the sun himself with darkness.