Note, 1. It is good for us to be reproved, and told of our faults, by our friends. If true love in the heart has but zeal and courage enough to show itself in dealing plainly with our friends, and reproving them for what they say and do amiss, this is really better, not only than secret hatred (as Lev 19:17), but than secret love, that love to our neighbours which does not show itself in this good fruit, which compliments them in their sins, to the prejudice of their souls. Faithful are the reproofs of a friend, though for the present they are painful as wounds. It is a sign that our friends are faithful indeed if, in love to our souls, they will not suffer sin upon us, nor let us alone in it. The physician's care is to cure the patient's disease, not to please his palate. 2. It is dangerous to be caressed and flattered by an enemy, whose kisses are deceitful We can take no pleasure in them because we can put no confidence in them (Joab's kiss and Judas's were deceitful), and therefore we have need to stand upon our guard, that we be not deluded by them; they are to be deprecated. Some read it: The Lord deliver us from an enemy's kisses, from lying lips, and from a deceitful tongue.

Open rebuke is better than secret love. This is to be understood, not of rebuke publicly given; though Aben Ezra thinks public reproof is meant, which, arising from love, is better than that which is done in secret, though in love, as being more effectual; for rebuke among friends should be given privately, according to our Lord's direction, Mat 18:15; but it signifies reproof given faithfully and plainly, with openness of heart, and without mincing the matter, and palliating the offence; but speaking out freely, and faithfully laying before a person the evil of his sin, in all the circumstances of it, as the Apostle Paul did to Peter, when he withstood him to the face, because he was to be blamed, Gal 2:11. Now such kind of reproof is better than such love to a person as will not suffer him to tell him of his faults, for fear of grieving him, or losing his friendship; or than such love as does not show itself in deeds, and particularly in faithful reproofs; for so to act is to hate a person, and suffer sin to be upon him, Lev 19:17.
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Proverbs 27:6

pro 27:6
pro 27:6
pro 27:6Faithful are the wounds of a friend,.... That is, friendly reproofs; which, though they may be severe, at least thought so, and may grieve and wound, and cause pain and uneasiness for the present, yet, proceeding from a spirit of love, faithfulness, and integrity, and designed for the good of the person reproved, ought to be kindly received; see Psa 141:5;

but the kisses of an enemy are deceitful; flow from a deceitful heart, and not to be confided in, as the kisses of Joab and Judas. It may be rather rendered, "are to be deprecated" (y); prayed against, as real evils, hurtful and pernicious; and so the Targum renders it, "are evil". Good is the advice of Isocrates (z),

"reckon them faithful, not who praise everything thou sayest or doest, but those that reprove what is amiss.''

(y) "deprecanda", Junius & Tremillius, Piscator, Cocceius, Amama. (z) Ad Nicoclem, p. 38.

secret love--not manifested in acts is useless; and even, if its exhibition by rebukes wounds us, such love is preferable to the frequent (compare Margin), and hence deceitful, kisses of an enemy.