Shared ground
Paul’s point is to shrink the Corinthians’ tendency to treat famous teachers as team captains. In these verses he asks, “Who is Apollos?” and “Who is Paul?” and answers: they are servants—people God uses as channels, not the basis for group identity (explicit claim).
Paul also affirms that real human work happened. He describes distinct tasks: “I planted” and “Apollos watered” (explicit claim). But he draws a clear line between work and results: the decisive “increase” comes from God (explicit claim).
Where interpretation differs
Some readers take “neither…is anything” as Paul nearly dismissing human leaders as insignificant in every sense. Others read it as a strong comparison: leaders matter as workers, but they are “not anything” as the source of growth or as the object of loyalty (inference from the farming contrast and the conclusion).
A second difference is what “as the Lord gave to him” includes. Some think it mainly means God assigns different tasks or opportunities (planting vs. watering). Others think it also includes effectiveness—God not only assigns work but also grants whatever fruit comes from it (inference from “God gave the increase”).
Why the disagreement exists
The sentences are brief and absolute-sounding (“neither…is anything”), while the illustration assumes real labor. Also, “gave” can refer to a role, a capacity, or the outcome; the context points toward God as the decisive cause of growth, but it does not spell out every detail.
What this passage clearly contributes
These verses separate instrumental ministry (“through whom you believed”) from ultimate causation (“God gave the increase”). They locate Christian leaders under God’s assignment (“as the Lord gave to him”) and deny that ministers are the proper center of loyalty (“neither…is anything” compared to God’s role). They also normalize different kinds of work in the same community without turning those differences into rivalry.