Passage
For thus saith Jehovah: There shall never fail to David a man to sit upon the throne of the house of Israel;
For thus saith Jehovah: There shall never fail to David a man to sit upon the throne of the house of Israel;
Jeremiah 33:15 In those days, and at that time, will I cause a Branch of righteousness to grow up unto David; and he shall execute judgment and righteousness in the land.
Jeremiah 33:16 In those days shall Judah be saved, and Jerusalem shall dwell in safety. And this is the name wherewith she shall be called: Jehovah our Righteousness.
Jeremiah 33:17 For thus saith Jehovah: There shall never fail to David a man to sit upon the throne of the house of Israel;
Jeremiah 33:18 neither shall there fail to the priests the Levites a man before me to offer up burnt-offerings, and to burn oblations, and to do sacrifice continually.
Jeremiah 33:19 And the word of Jehovah came to Jeremiah, saying,
The verse centers on "thus", "saith", "jehovah", "shall", "never", "fail", "david", and "upon". It is saying that the verse draws attention to "thus" and "saith", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 16's "In those days shall Judah be saved..." into verse 18's "neither shall there fail to the priests...", so "thus" and "saith" belong inside that flow. In Jeremiah context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "thus" and "saith" with trust shaped by these words, not by a vague optimism outside the passage.