John Gill
Faithful [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 Psalms 141:5; but the kisses of an enemy [are]...
Matthew Henry
1 Boast not thyself of to morrow; for thou knowest not what a day may bring forth. Here is, 1. A good caution against presuming upon time to come: Boast not thyself, no, not of to-morrow, much less of many days or years to come. This does not forbid preparing for to-morrow, but presuming upon to-morrow. We must not promise ourselves the continuance of our lives and comforts till to-morrow, but...
Charles H. Spurgeon
Faithful are the wounds of a friend; but the kisses of an enemy are deceitful. Beware of the flattering world, believer; beware of the flattering devil, and of the cozening of the flesh. When things go smoothly with you, there may be the greatest danger. Whatever you do in times of storm, keep a good look-out when the sea is calm and the sky is clear.