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Having no message of their own, what were the false prophets to do? The best they could do was to repeat and imitate what had been said by their predecessors. It is with this Jeremiah reproaches them when he says, "Behold, I am against the prophets, saith the Lord, that steal My words everyone from his neighbour." The older prophets used to begin their utterances with the phrase, "the burden of the Lord;" and Jeremiah complains that this had become an odious cant term in the mouths of his contemporaries; and in the same way Zechariah complains that in his day the great word "comfort," which from the lips of Isaiah had descended like dew from heaven on the parched hearts of the people of God, had become a dry and hackneyed phrase in the mouths of false prophets. How dangerous this habit of stealing the words of others might become, when practical issues were involved, may be illustrated by a striking example. The inviolability of Jerusalem had been a principle of the older prophets, which was quite true for their times; and Isaiah had made use of it for rousing his fellow-citizens from despair, when the army of Sennacherib stood before the gates. But in Jeremiah's time the change of circumstances had made it to be no longer true; and yet the false prophets kept on repeating it; and no doubt they seemed both to themselves and others to be occupying a strong position when, in opposing him, they could allege that they were standing on the same ground as Isaiah. All the time, however, they were betraying those who listened to them.
There is a sense in which the truth of God is unchangeable; it is like Himself--the same yesterday and to-day and forever. But there is another sense in which it is continually changing. Like the manna, it descends fresh every morning, and, if it is kept till to-morrow, it breeds loathsome worms. Isaiah describes the true prophet as one who has the tongue of the learner--not of the learned, as the Authorised Version gives it--and whose ear is opened every morning to hear the message of the new day. What was truth for yesterday may be falsehood for to-day; and only he is a trustworthy interpreter of God who is sensitive to the indications of present providence.
It would, however, be a mistake to suppose that the only form which false prophecy can take is a dried-up orthodoxy, mumbling over the shibboleths of yesterday. If he who stands forward as a speaker for God is out of touch with God and has really no Divine message, he may make good the lack of a true Divine word in many ways. The easiest way is, no doubt, to fall back on some accepted word of yesterday; but he may also strike out on the path of originality, announcing a gospel for to-morrow, constructed by his own fancy, which has no Divine sanction. Neither orthodoxy nor heterodoxy is a guarantee: the only guarantee is a humble mind living in the secret of the Lord.
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I have mentioned that the prophets subsisted on the contributions of those to whom their oracles were supposed to be valuable. There is, indeed, very little information on this head; but they are accused of prophesying for bread, and avarice and a greedy appetite for the good things of this life are reproaches frequently cast at them. It is not likely that prophecy can ever have been a paying profession, but it would appear to have been at least a means of livelihood; and there are indications that those who enjoyed an exceptional popularity may have occupied a high social standing. Ezekiel, whose characterizations of the false prophets are remarkably striking, uses about them a significant figure of speech. He says that, while a true prophet was like a wall of fire to his country, standing in the breach when danger threatened and defending it with his life, the false prophets were like the foxes that burrow among the ruins of fallen cities. What mattered it to them that their country was degraded, if only they had found comfortable places for themselves?