The damning sin laid to Israel's charge is idolatry, with all the moral consequences involved in that prime transgression. That is to say, the offence consisted not barely in recognising and honouring the gods of the nations along with their own God, though that were fault enough, as an act of treason against the sole majesty of Heaven; but it was aggravated enormously by the moral declension and depravity, which accompanied this apostasy. They and their fathers forsook Iahvah "_and kept not His teaching_;" a reference to the Book of the Law, considered not only as a collection of ritual and ceremonial precepts for the regulation of external religion, but as a guide of life and conduct. And there had been a progress in evil; the nation had gone from bad to worse with fearful rapidity: so that now it could be said of the existing generation that it paid no heed at all to the monitions which Iahvah uttered by the mouth of His prophet, but walked simply in stubborn self-will and the indulgence of every corrupt inclination. And here too, as in so many other cases, the sin is to be its own punishment. The Book of the Law had declared that revolt from Iahvah should be punished by enforced service of strange gods in a strange land (Deut. iv. 28, xxviii. 36, 64); and Jeremiah repeats this threat, with the addition of a tone of ironical concession: there, in your bitter banishment, you may have your wish to the full; you may serve the foreign gods, and that without intermission (implying that the service would be a slavery). The whole theory of Divine punishment is implicit in these few words of the prophet. They who sin persistently against light and knowledge are at last given over to their own hearts' lust, to do as they please, without the gracious check of God's inward voice. And then there comes a strong delusion, so that they believe a lie, and take evil for good and good for evil, and hold themselves innocent before God, when their guilt has reached its climax; so that, like Jeremiah's hearers, if their evil be denounced, they can ask in astonishment: "What is our iniquity? or what is our trespass?" They are so ripe in sin that they retain no knowledge of it as sin, but hold it virtue. "And they, so perfect is their misery, Not once perceive their foul disfigurement, But boast themselves more comely than before." And not only do we find in this passage a striking instance of judicial blindness as the penalty of sin. We may see also in the penalty predicted for the Jews a plain analogy to the doctrine that the permanence of the sinful state in a life to come is the penalty of sin in the present life. "He that is unjust, let him be unjust still; and he that is filthy, let him be filthy still!" and know himself to be what he is.