2 Peter 2:22

It has happened unto them according to the true proverb, the dog turning to his own vomit again, and the sow that had washed to wallowing in the mire.

The first of these proverbs is found in Proverbs 26:11, another indication of the familiarity which Peter had with the book of Proverbs. The origin of the second half of this verse is not known; but it is exactly the same kind of stark, realistic, down-to-earth saying as the other half, both expressions being exactly the type of homely wisdom that would have been familiar to a man like Peter. In fact, this whole chapter, the reference to "bait" in the enticement to sin, the impetuous and enthusiastic manner of the writing, as he piles word upon word, phrase upon phrase, rushing on to his conclusion - the whole thing is absolutely harmonious with what the New Testament reveals elsewhere of the mind and personality of this magnificent apostle.

Before concluding the study of this verse, it should be noted that we have to do here with a prophecy of what would take place in the after times of Christianity; and in a word, the prophecy has been most overwhelmingly and circumstantially fulfilled. Who can deny that the very things foretold by Peter are even now in the world? and neither is this to deny that other manifestations and fulfillments of this prophecy have appeared at other times previously. Furthermore, Peter was not finished with the prophecy at the end of this chapter; but he would go on to elaborate even more fully on these matters in chapter 3.

There is no logical way for people to deny that the Spirit of the Lord spoke through Peter in this epistle.