The miserable result on the sinners' own natures is described with pregnant brevity in verse 15. 'They followed vanity, and became vain.' The worshipper became like the thing worshipped, as is always the case. The idol is vanity, utter emptiness and nonentity; and whoever worships nothingness will become in his own inmost life as empty and vain as it is. That is the retribution attendant on all trust in, and longing after, the trifles of earth, that we come down to the level of what we set our hearts upon. We see the effects of that principle in the moral degradation of idolaters. Gods lustful, cruel, capricious, make men like themselves. We see it working upwards in Christianity, in which God becomes man that men may become like God, and of which the whole law is put into one precept, which is sure to be kept, in the measure of the reality of a man's religion. 'Be ye therefore imitators of God, as beloved children.' In verses 16 and 17 the details of the idolatry follow the general statement, as in verses 9 to 12, but with additions and with increased severity of tone. We hear now of calves and star worship, and Baal, and burning children to Moloch, and divination and enchantment. The catalogue is enlarged, and there is added to it the terrible declaration that Israel had 'sold themselves to do evil in the sight of the Lord.' The same thing was said by Elijah to Ahab--a noble instance of courage. The sinner who steels himself against the divine remonstrance, does not merely go on in his old sins, but adds new ones. Begin with the calves, and fancy that you are worshipping Jehovah, and you will end with Baal and Moloch. Refuse to hear God's pleadings, and you will sell your freedom, and become the lowest and only real kind of slave--the bondsman of evil. When that point of entire abandonment to sin, which Paul calls being 'sold under sin,' is reached, as it may be reached, at all events by a nation, and corruption has struck too deep to be cast out, once again the anger of the Lord is provoked; but this time it comes in a different guise. The armies of the Assyrians, not the prophets, are its messengers now. Israel had made itself like the nations whom God had used it to destroy, and now it shall be destroyed as they were.