Shared ground
These two verses underline human limitation. What exists is not treated as a fresh human invention; it already has its “name,” meaning its identity and place are not decided by us (explicit textual claim: “Whatever exists had its name given long ago”). The text also assumes there is a settled realism about what a human being is—finite, not ultimate (explicit claim: “It is known what a human being is”).
The passage then draws a boundary: humans cannot successfully “contend” (argue a case, dispute) with someone stronger (explicit claim: “A person cannot contend with one mightier than himself”). It closes by questioning the value of multiplying words, because “many words” increase “vanity” (emptiness) rather than producing real profit (explicit claims: “There are many words that create or increase vanity” and the profit-question).
Where interpretation differs
Who is “the one mightier”? Some read the “mightier” one as God—so the point is that arguing against God’s ordering of life is futile. Others read it more generally as whatever stands over human beings (the fixed structure of reality, mortality, or the way outcomes escape control). Both readings preserve the basic direction: there is something greater than us that we cannot overpower with argument.
What does “named long ago” imply? Some take “named” to imply something like destiny or a settled appointment for how life turns out. Others take it as classification/description: things already have their recognized nature, and humans do not get to redefine them by talk.
Why the disagreement exists
The phrases are brief and compressed. “Named” can signal either assigning an identity or assigning a course. Likewise, “mightier” is not explicitly identified. The immediate context (Ecclesiastes’ repeated stress on limits and lack of control) supports a general claim about human finitude, while other passages in the book make God’s sovereignty an available referent, so interpreters differ on how directly God is being referenced here.
What this passage clearly contributes
Explicitly, it contributes a wisdom claim about limits: human beings encounter boundaries that are not set by human speech or will. The text presses skepticism about the power of argument, explanation, or sheer volume of words to produce lasting “profit” (gain). A theological inference consistent with these claims is that wisdom includes accepting creaturely limits and recognizing that talk is not mastery—especially when the “opponent” is stronger than the human speaker (whether understood as God or the fixed conditions of human life).