"Dogs" signify people who spurn, oppose, and abuse that doctrine; people of special sourness and malignity of temper, who meet it like growling and quarrelsome curs, Philippians 3:2; II Peter 2:22; Revelation 22:15. "Swine" denote those who would trample the precepts underfoot; people of impurity of life; those who are corrupt, polluted, profane, obscene, and sensual; those who would not know the value of the gospel, and who would tread it down as swine would pearls, II Peter 2:22; Proverbs 11:22. The meaning of this proverb, then, is, do not offer your doctrine to those violent and abusive people who would growl and curse you; nor to those especially debased and profligate who would not perceive its value, would trample it down, and would abuse you.