As free. — This points at once to what was the gist of the accusation. The Christian took up a position of complete independence within, and professed himself in a certain sense to be above the laws, by virtue of being a member of Christ’s kingdom. This position of independence the heathen state resented, and looked upon the Christian Church as a dangerous organisation. Here, therefore, St. Peter both insists upon, and defines that independent position. “This the Apostle adds,” says Leighton, “lest any should so far mistake the nature of their Christian liberty as to dream of an exemption from obedience either to God or to man for His sake, and according to His appointment. Their freedom he grants, but would have them understand aright what it is.”
And not using. — The word “as” in the Greek attaches better to the participle instead of to the word “cloke,” so that the sentence will run, As free (i.e., as men who are really free), and not as using freedom for a curtain of vice. In this way the true and the false freedom are more forcibly contrasted.
For a cloke of maliciousness. — The uncommon word here used means any kind of covering, but not in the sense of a garment, so that we must not insist on the metaphor of the word “cloke.” The same Greek word is used in Exodus 26:14 to express the second covering of the tabernacle there mentioned, i.e., the uppermost, outermost covering. Grimm quotes a fragment of the comic poet Menander, “Wealth is a covering of many a bad thing;” this helps us to see that what St. Peter means is not ordinary hypocrisy. The man does not profess to be better than he is, but loudly asserts that he is not a slave. Men admire such freedom of speech, and excuse his vices just because of their openness.
But as the servants of God. — Such freedom as has been mentioned is no freedom. It is moral slavery. The only true freedom lies in being “servants” (or rather slaves) “of God,” whose will it is that you should be good subjects (1 Peter 2:13; 1 Peter 2:15). For a slightly different turn of thought, see Galatians 5:13.