This witness is true
The apostle confirms what the poet had said; he knew it to be fact from his own experience, and by the observation he had made when in the island: he does not say, that all that Epimenides had said, in the poem referred to, was true; but this character, which he had given of the Cretians, and which he cites, and uses to a good purpose; from whence it may be observed, that the writings of the Heathen poets may be read with profit, and be used to advantage, if carefully and prudently attended to; for what is truth, let it come from whom, or by what means it will, ought to be received.
Wherefore rebuke them sharply:
not merely upon the testimony of the poet, but upon the confirmation of it by the apostle; and not because of these general and national characters, but because these things personally and particularly belonged to the persons before described; whom the apostle would have rebuked, both for their bad principles, teaching things that they ought not; and for their immoralities, their lying and deceit, their intemperance, luxury, and idleness, things very unbecoming the Christian name; and therefore since their offences were of an heinous nature, and they lived in them, and were hardened and obstinate, and were like to have a bad influence on others, they must be rebuked "sharply": rebukes ought to be given according to the nature of offences, and the circumstances of them, and the offenders; some are to be given privately, others publicly; some should be reproved with gentleness and meekness, and be used in a tender and compassionate way; others more roughly, though never in a wrathful and passionate manner, yet with some degree of severity, at least with great plainness and faithfulness; laying open the nature of the evils guilty of in all their aggravated circumstances, without sparing them in the least; doing, as surgeons do by wounds, though they take the knife, and use it gently, yet cut deep, to the quick, and go to the bottom of the wound, and lay it open: and so the phrase may be rendered here, "rebuke them cuttingly"; cut them to the quick, and spare them not; deal not with them as Eli with his sons, ( 1 Samuel 2:23 ) but speak out, and expose their crimes, severely reprove them, that others may fear: and
that they may be sound in the faith;
that they may be recovered from their errors, to the acknowledgment of the truth; that they may receive the sound doctrine of faith, the wholesome words of Christ, and speak the things which become them, and use sound speech, which cannot be condemned; and that they may be turned from their evil practices, and appear to be sound, as in the doctrine, so in the grace of faith; or that that by their works may appear to be genuine, true, and unfeigned; and that they may be strong and robust, hale and healthful, and not weak and sickly in the profession of their faith. Rebukes being to persons infected with bad principles and practices, like physic to sickly constitutions, a means of removing the causes of disorder; and in rebukes, admonitions, and censures, this always ought to be the end proposed, the good of the persons rebuked, admonished, and censured.