He afterwards adds, And think not evil every one against his friend. Here the Prophet not only condemns open wrongs, but also the hidden purposes of evil. We hence learn, that the law was not only given to restrain men as it were by a bridle, and that it not only contains a rule of life as to outward duties, but that it also rules their hearts before God and angels. The law is indeed really spiritual; and extremely gross and foolish are they who think that they satisfy the law of Moses, when they abstain from murder and theft and other evil deeds; for we see that the Prophets everywhere required a right feeling in the hearts as Zechariah does in this place, who reminds the Jews, that they were not to devise evil against their friends, no, not in their hearts. He might have omitted the last words; but he meant to condemn those frauds which were wont to be covered by many and various disguises. Though then men may not bring forth their wickedness, yet Zechariah shows that God will punish it; for whatever dwells within, however concealed it may be from the eyes of men, however hidden it may be in the depth of the heart, it must yet come to an account before God.
He adds another kind of evil, even perjury, And love not the oath of falsehood. He might have said, swear not to the injury of thy neighbor; but there is to be observed here a contrast between the perverted love of men and the hatred of God. As then God hates a false oath as all other frauds and falsehoods, so he forbids us to desire it: for if we wish to please God, we must see what he requires from us, inasmuch as we designedly provoke his wrath when we desire or covet what he declares that he hates. In a word, Zechariah shows that God would be propitious and kind to the Jews, provided they truly and from the heart repented, and attended to what was right and just — not only to build the temple, to offer sacrifices, and to observe other rites, but also to form their life according to what integrity required; to labor not only by external acts to discharge their duties towards their neighbors; but also to cleanse their hearts from all hatred, all cruelty, and all depraved affections. It now follows —