What does it mean that some believed and some believed not?

The statement that 'some believed and some believed not' underscores a fundamental dichotomy in the human response to the Gospel. This reflects that there are no neutral grounds when confronted with the call of Christ. Each person will either accept or reject the truth concerning Jesus, displaying a response that is either passive belief enabled by God's grace or active unbelief resulting from personal choice.

Acts 28:24 emphasizes this reality, showing that belief comes from the Spirit of God’s work in our hearts, whereas disbelief often stems from our stubbornness or rejection of God’s truth. This duality accentuates the urgency for believers to exemplify and share the Gospel, while also recognizing that the results of preaching are ultimately determined by God. Understanding this distinction fortifies a believer's assurance in their faith and reinforces the urgency of proclaiming the truth, as we realize that faith is a divine gift and unbelief a tragic choice that leads to destruction.