Note, 1. We must do that which is commendable, for which even strangers may praise us. Our light must shine before men, and we must do good works that may be seen, though we must not do them on purpose that they may be seen. Let our own works be such as will praise us, even in the gates, Phi 4:8. 2. When we have done it we must not commend ourselves, for that is an evidence of pride, folly, and self-love, and a great lessening to a man's reputation. Every one will be forward to run him down that cries himself up. There may be a just occasion for us to vindicate ourselves, but it does not become us to applaud ourselves. Proprio laus sordet in ore - Self-praise defiles the mouth.

Let another man praise thee, and not thine own mouth,.... Men should do those things which are praiseworthy; and should do them openly, that they may be seen and praised for them: for it is honourable to have such a character as Demetrius had, who had a good report of all men; and as the brother had, whose praise in the Gospel was in all the churches. To be commended by others, by any but a man's self, is to his credit and reputation; but nothing more hurtful to it than self-commendation; see Co2 10:18; in some cases it is right for a man indeed to commend himself, when the glory of God, the credit of religion, the cause of truth and self-vindication, require it; as the prophet Samuel, the Apostle Paul, and others, have been obliged to do, Sa1 12:3, &c.

a stranger, and not thine own lips; a stranger means any other than a man's self; and if it is one that he knows not, or has little acquaintance with; or if a foreigner, that does not personally know him, only has good testimonies of him, or has read his works; and especially if in other respects an enemy; it is greatly to his honour to be praised by him: and such a commendation comes with much better grace than from himself, and from whom indeed it would not come with any.

Avoid self-praise.