10:12-18 If we would compare ourselves with others who excel us, this would be a good method to keep us humble. The apostle fixes a good rule for his conduct; namely, not to boast of things without his measure, which was the measure God had distributed to him. There is not a more fruitful source of error, than to judge of persons and opinions by our own prejudices. How common is it for persons to judge of their own religious character, by the opinions and maxims of the world around them! But how different is the rule of God's word! And of all flattery, self-flattery is the worst. Therefore, instead of praising ourselves, we should strive to approve ourselves to God. In a word, let us glory in the Lord our salvation, and in all other things only as evidences of his love, or means of promoting his glory. Instead of praising ourselves, or seeking the praise of men, let us desire that honour which cometh from God only.
18. (Pr 27:2).
whom the Lord commendeth—to whom the Lord has given as His "Epistle of commendation," the believers whom he has been the instrument of converting: as was Paul's case (2Co 3:1-3).
is approved—can stand the test of the final trial. A metaphor from testing metals (Ro 16:10; 1Co 11:19). So on the other hand those finally rejected by the Lord are termed "reprobate silver" (Jer 6:30).