Psalms 81:14

14.I would soon have brought their enemies low. Here the Israelites are taught, that all the calamities which had befallen them were to be imputed to their own sins; for their enemies did not fight against them with any other strength than that with which they were supplied from above. God had promised that under his leading the chosen people would prove victorious over all their enemies; and now to take away all ground for charging him with violating his word, he affirms that he would not have failed to enable them to do this had he not been prevented by their sins. He doubtless intends tacitly to remind them that the victories which they had formerly achieved were not owing to their own military valor, but to Him under whose conduct they had been placed. Now, he tells them that he was not only kept back by their sins from putting forth his power to defend them, but that he was also compelled by their perverseness to rush against them with the sword in his hand, while he left their enemies to remain in undisturbed tranquillity.