7:16 Ye shall know them by their fruits. This common figure is wonderfully expressive. Not leaves (professions), or appearance, are the proper tests of the life that is in the tree, but the fruit it bears. We are to test men and every institution by this principle.
Grapes of thorns. Two of the most highly valued fruits of Palestine are grapes and figs. Nothing is more common than thorns and thistles. Geike says that it is the land of thorns and thorny plants. Good fruit cannot be expected on such evil stocks.
7:16 By their fruits ye shall know them - A short, plain, easy rule, whereby to know true from false prophets: and one that may be applied by people of the weakest capacity, who are not accustomed to deep reasoning. True prophets convert sinners to God, or at least confirm and strengthen those that are converted. False prophets do not. They also are false prophets, who though speaking the very truth, yet are not sent by the Spirit of God, but come in their own name, to declare it: their grand mark is, Not turning men from the power of Satan to God. Luke 6:43,44.
7:15-20 Nothing so much prevents men from entering the strait gate, and becoming true followers of Christ, as the carnal, soothing, flattering doctrines of those who oppose the truth. They may be known by the drift and effects of their doctrines. Some part of their temper and conduct is contrary to the mind of Christ. Those opinions come not from God that lead to sin.
