Shared ground
The passage gives an observation about political life “under the sun”: public admiration is unstable. The text explicitly contrasts two figures: a “poor and wise youth” and an “old and foolish king” who has stopped accepting correction (v.13). It then describes a dramatic change in status—someone comes “out of prison” to become king, and the same person is described as having been “born poor” (v.14). The speaker reports seeing the crowds align themselves “with the youth” who takes the earlier ruler’s place (v.15), and yet later people do not keep celebrating him (v.16).
A theological inference (going beyond what is explicitly stated) is that wisdom and teachability can matter more than rank, and that human approval—even when it looks endless—is not a secure foundation for lasting “gain,” matching Ecclesiastes’ wider theme of vapor-like outcomes.
Where interpretation differs (only where needed)
Some readers think the story involves two leadership changes: an old king is replaced by a youth, and then a later generation rejects that youth when someone else rises.
Others think it is one main reversal (old king → youth), and the final line (“those who come after shall not rejoice in him”) simply means the youth’s popularity fades with time.
A second difference concerns who comes “out of prison” (v.14). Many take it as the youth’s background. Others argue the grammar could point to the old king’s earlier rise (he once came from hardship), which would sharpen the warning that even a self-made ruler can become unteachable.
Why the disagreement exists
The pronouns in vv.15–16 (“him”) can naturally point to different people, and the phrase “the youth, the other” can be heard as either the same successor being described in two ways or as a hint of another successor waiting in the wings. Also, v.14’s wording allows more than one plausible subject (“he came out of prison”).
What this passage clearly contributes
Whatever the exact sequence, the text’s explicit claims build one clear point: political success and mass support (“all,” “no end of the people”) do not last. Crowds can quickly rally to a new leader and just as quickly move on. Ecclesiastes uses that instability to reinforce its recurring verdict that much of human striving—especially the pursuit of lasting honor through status—turns out to be fleeting Ecclesiastes 4:16.