4. Let those who seek my soul be confounded. David now calls upon God to take vengeance upon his enemies; and he asks not only that he would disappoint and destroy their designs, but also that he would recompense them according to their deserts. In the first place, he desires that they may be confounded and put to shame in seeing their expectation and desire fail; and then he proceeds farther, desiring that while they imagine themselves to be firmly established, and deeply rooted, they may be like chaff or stubble. As the chaff is driven with the wind, so also he desires, that, being disquieted by the secret impulse of the angel of the Lord, they may never have rest. The imprecation which follows is even more dreadful, and it is this: that wherever they go they may meet with darkness and slippery places; and that in their doubt and perplexity the angel of the Lord would pursue them. In fine, whatever they devise, and to whatever side they turn, he prays that all their counsels and enterprises may come to a disastrous termination. When he desires that they may be driven by the angel of the Lord, we learn from this that the reason why the ungodly are troubled, though no man pursues them, is, that God smites them with a spirit of amazement, and distracts them with such fears that they tremble and are troubled.