Jeremiah 42:5

It hence appears that the people understood for what purpose Jeremiah, before he consulted God, assured them of his faithfulness and sincerity; for it was not without reason that they promised to be obedient to God; but as they saw that they were suspected as being not sincere by Jeremiah, and as he had promised to be a true and faithful teacher, they on the other hand declared that they would be sincere disciples, and would receive whatever God might command them. But they soon betrayed their perfidy, for when they heard that what they had resolved to do did not please God, they not only rejected the counsel of God and the Prophet, but treated him insolently, and even loaded the holy man with reproaches, as though he had told them what was false. Their hypocrisy ought at the same time to be a lesson to us, so that when God is pleased through a singular favor to shew us the way of acting rightly by faithful instructors and competent teachers, we may not be like them, but be teachable and ready to obey, and prove this not only by the mouth but also by our deeds.

The Prophet then says, that they spoke thus, Let God be a faithful and true witness between us. Being not content with a simple affirmation, they dared to interpose the name of God; and thus we see how blind is hypocrisy. For if men duly weigh what it is to profane God’s name, surely they would dread and abominate all perjury. As then they rushed on so audaciously to swear, it is evident that they were as it were stupefied; and there is no inebriety which so confuses the minds of men and all their senses as hypocrisy.

They then added, According to whatever word which Jehovah thy God shall send to us, so will we do, that is, whatever Jehovah shall command us by thee; for God is said to send to men, when he sends a messenger in his name to bring his commands. Jeremiah then was, as it were, a middle person to address the people in God’s name, as though he had been sent from heaven. They therefore said, that they would do whatever God commanded. A stronger expression follows, Whether good or evil, we will obey the voice of Jehovah our God They did not here charge God’s word with being wrong, as though it had anything unjust in it; but they used good in the sense of joyful, and evil as meaning what is sad or grievous, as though they had said, that they asked for no other thing but that God should declare what pleased him, and that they were so submissive as to refuse nothing though contrary to the flesh. Had this declaration proceeded from the heart, it would have been a testimony of true piety; for the minds of the godly ought to be so framed as to obey God without making any exception, whether he commands what is contrary to their purpose, or leads them where they do not wish to go; for they who wish to make a compact with God, that he should require nothing but what is agreeable to them, shew that they know not what it is to serve God. Hence the obedience of faith in an especial manner requires this, that man should renounce his own desires, that he should not set up his own counsels and wishes against the word of God, nor object and say, this is hard, that is not quite agreeable. Whether then it be good or evil, that is, though it may be contrary to the feelings of the flesh, we ought still to embrace what God requires and commands: this is the rule of true religion.