Zechariah 8:9

He says, Thus saith Jehovah of hosts, Strengthened let be your hands. He exhorts them to perseverance: but as men become weak, and many things occur which enfeeble or break down their courage, he uses the word, strengthen; for it is often necessary to gather new strength, and to confirm a pious resolution. Let us now then learn to apply this doctrine to our own benefit, and let us understand what experience sufficiently teaches us, even this — that our hands, though at first well prepared, are yet soon relaxed, and as it were loosed, and even entirely fail, unless new strength be now and then attained; and that this is effected when we are animated by God’s word, and rise superior to the trials which enfeeble us. And Zechariah will presently inform us whence this strength was to be sought, even from the promises which they had already heard from the Prophets; for he would have in vain exhorted them to persevere, had not the ground of confidence been mentioned. For when God is silent, our minds, though before abundantly ready and willing, must languish, and at length wholly fail.

We then see that there can be no courage in men, unless God supports them by his word, so that they may recover their lost strength and regain their alacrity. Had the Prophet only bidden them to take courage, they might have replied, that there was nothing in their circumstances to encourage them; but when the word of God was set before them, every excuse was taken away; and they were now to gird up the loins, and boldly to fight, inasmuch as God supplied them with weapons.

Be strong, he says, ye who hear in these days these words from the mouth of the Prophets. Though Zechariah is not often concise in his words, but in many parts diffuse, yet he is so here, and the whole verse is very emphatical; for after having said that they were not destitute of God’s promises, he adds, “in these days,” and also “these words.” He intimates that they were not only taught a general truth, that they were to render obedience, but that God himself would be their leader to direct their steps and to show them the way: in a word, he omits nothing to enable them to proceed without difficulty with the work which they had begun. There is then an emphasis intended by the demonstrative, “these,” “these;” for the Prophet intimates that God was continually speaking to them, and that he announced not only a general truth, but specific words, by which they might guide their feet and their hands in every action. And he says, that those words were heard from the mouth of the Prophets, for God intended honor to be done to his servants; and it is, as it has been often stated, a true test of faith, when God descends not himself from heaven, or does not appear to us in a visible form, but makes use of men as his ministers. Yet Zechariah briefly intimates, that the Prophets are not the authors of the promises, which are necessary to raise up, support, and stimulate our minds; for the Lord only employs their service; and this is what he means by the word mouth

He now adds, Who were in that day in which was founded the house of Jehovah, in order to build the temple. Not much time had elapsed since they had begun again to build the temple, and the foundations had been laid; but the work had been discontinued through the unbelief of them all, and also through the private regard of each to his own interest. For as they were in suspense and doubtful, there arose sloth and indifference, and avarice possessed them, so that they despised the temple of God. But he says now that during that short time God often spoke to them by his Prophets with the view of correcting their delay and tardiness, for the Prophet mentions here as it were but one day, for the purpose of expressing how short the time had been. Less excusable then was their sloth, since God daily spoke to them and confirmed by new Prophets what the former ones had said.