14. And whoever will not receive you. This awful threatening of punishment against the despisers of the gospel was intended to animate his disciples, that they might not be retarded by the ingratitude of the world. He directs the apostles, indeed, what he wishes them to do if they meet with despisers. But his principal design was that, wherever their doctrine was rejected, their well-founded grief and distress might be relieved by consolation, that they might not fail in the middle of their course. And we see how Paul, relying on this consolation, boldly sets at naught all the obstinacy of men, moves on steadily in the midst of hindrances, and boasts that he is
a sweet savor to God, though he is the savor of death to them that perish, (2 Corinthians 2:15.)
Now, this passage shows in what estimation the Lord holds his gospel, and, indeed, as it is an inestimable treasure, they are chargeable with base ingratitude who refuse it when offered to them. Besides, it is the scepter of his kingdom, and therefore cannot be rejected without treating him with open contempt.
Shake off the dust As the Lord here recommends the doctrine of the gospel, that all may receive it with reverence, and terrifies rebels by threatening severe punishment, so he enjoins the apostles to proclaim the vengeance which he threatens. But this they cannot do, unless they burn with very ardent zeal to make known the doctrines which they preach. We must therefore hold that no man is qualified to become a teacher of heavenly doctrine, unless his feelings respecting it be such, that he is distressed and agonized when it is treated with contempt.
To shake off the dust from the feet was probably a custom then prevalent in Judea, as a sign of execration; and was intended to declare that the inhabitants of the place were so polluted, that the very ground on which they trod was infected. That it was an ordinary custom I conjecture from our Lord’s manner of speaking of it as a thing well known. This form of execration confirms still more what I lately mentioned, that no crime is more offensive to God than contempt of his word: for he does not enjoin them to make use of so solemn a mode in expressing their detestation of adulterers, or murderers, or any description of malefactors.