For I have made thee this day a defenced city That is, from this day I will so defend thee that they shall be no more able to hurt thee than they would be if thou wast in a strongly-fortified and impregnable city. And brazen walls Which cannot be broken or battered down with any force. Against the whole land, against the kings, &c. All its inhabitants in general; intimating that, though men of all degrees should set themselves against him, yet God would support him against them all, and would carry him through his work, although his troubles would not only be great, but long, extended through several kings' reigns. And they shall fight against thee Shall oppose thee, and manifest much hostile hatred against thee; but they shall not prevail They shall not be able, by all their devices, to shorten thy days, or to prevent thy executing the charge given thee. For I am with thee, to deliver thee I will show my power in protecting and delivering thee out of all thy troubles, when thy adversaries shall become a prey to their enemies.
Related Commentaries of Jeremiah 1:18
Jeremiah 1:18-19
18 For, behold, I have made thee this day a defenced city, and an iron pillar, and brasen walls against the whole land, against the kings of Judah, against the princes thereof, against the priests thereof, and against the people of the land.
19 And they shall fight against thee; but they shall not prevail against thee; for I am with thee, saith the LORD, to deliver thee.