Passage
And they shall fight against them, and shall not prevail: for I am with thee, saith the Lord, to deliver thee.
And they shall fight against them, and shall not prevail: for I am with thee, saith the Lord, to deliver thee.
Jeremiah 1:17 Thou therefore gird up thy loins, and arise, and speak to them all that I command thee. Be not afraid at their presence: for I will make thee not to fear their countenance.
Jeremiah 1:18 For behold I have made thee this day a fortified city, and a pillar of iron, and a wall of brass, over all the land, to the kings of Juda, to the princes thereof, and to the priests, and to the people of the land.
Jeremiah 1:19 And they shall fight against them, and shall not prevail: for I am with thee, saith the Lord, to deliver thee.
The verse centers on "shall", "fight", "against", "prevail", "thee", "saith", and "lord". It is saying that the verse draws attention to "shall" and "fight", so its meaning should be read from those terms before moving to application.
The prior verse says "For behold I have made thee this...", giving immediate footing for "shall" and "fight". In Jeremiah context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "shall" and "fight" with trust shaped by these words, not by a vague optimism outside the passage.