Jeremiah 15:20

But God proceeds lay degrees; for he first declares that his Prophet would be like a brazen and a fortified wall, that is, like an invincible city: for by stating a part for the whole, a wall means a city that is impregnable. It then follows, They indeed will fight against thee. This warning was very necessary; for Jeremiah was doubtless willing to serve God in exercising authority over teachable and humble men, and in gently inducing them to render obedience to God; but he is reminded here that he would have many hard contests with a rebellious people, They will fight, he says, against thee We see how God does not promise ease to Jeremiah, nor gives him a hope of a better lot in future; but, on the centrary, he exhorts him to fight; and why? because the people would not bear the yoke of God, but kindled into rage against him. But another promise follows, They shall not prevail against thee, or overcome thee.

It was indeed necessary for Jeremiah of his own self to disturb the Jews; for nothing would have been more agreeable to them than his silence; and the object of all their attempts was to drive him to despair. But it is not without reason that they are said to fight with him; for it is contrary to nature for men to resist God and to set themselves against him when he invites them to himself; for what can be more natural than for the whole world to hasten to God? It is then something monstrous for men to oppose God, nay, furiously to rise up against hhn, when he kindly calls them to himself. Hence it is that God here makes the Jews the authors of all this disturbance. For since they loaded the Prophet with the most wicked calumnies, as we have seen, and said, that he was a turbulent man and confounded all things by his morosity, God here shews, on the other hand, that all the commotions and the rightings ought to be attributed to them, because they ought to have obediently received the doctrine set before them.

But though this was said only once to Jeremiah, yet the condition of all God’s servants is here set before us as in a mirror; for they cannot perform what God commands them without having to encounter many and grievous assaults; for the world is never so prepared to obey God, but the greater part furiously resists, and, as far as it can, stifles the word of God and checks his ministers.

He states the reason, For I am with thee to save thee and to deliver thee By these words God exhorts his Prophet to prayer; for we know how dangerous is self-security to all the children of God, and especially to teachers. As then they have at all times need of God’s aid, they are to be exhorted to have recourse to solitude and prayer. This is the import of the words which God uses, I am with thee; as though he had said, “Thou indeed wilt not stand by thyself, or through thine own painstaking, nor wilt thou be a conqueror by carrying on war thyself; but thou must learn to flee to me.” It afterwards follows —