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).