When the truth of the gospel is preached, it disrupts and exposes lies, deceit, and falsehoods. As the new life of Christ grows within, the old and dead has no choice but to fall away.
Where Apollos was unclear, Aquila and Priscilla "explained to him the way of God more accurately." Paul spent three months "reasoning and persuading them about the Kingdom of God."
The Gospel keeps pulling us in the direction of the lost, toward those hungry to receive it. The only way to move toward the lost is to listen to the Spirit.
Paul uses the misguided beliefs of the Athenians to point them to the truth of Christ. We must learn to speak the truth of the gospel into everyday life.