24 And some were persuaded by the things which were spoken, and some disbelieved. 25 So when they did not agree among themselves, they departed after Paul had said one word: “The Holy Spirit spoke rightly through Isaiah the prophet to our fathers, 26 saying, ‘Go to this people and say: “Hearing you will hear, and shall not understand; And seeing you will see, and not perceive; For the hearts of this people have grown dull. Their ears are hard of hearing, And their eyes they have closed, Lest they should see with their eyes and hear with their ears, Lest they should understand with their hearts and turn, So that I should heal them”’ (Acts 28:24–27, NKJV).
Why do some people readily respond to the gospel of salvation? Why do some people reject the gospel and refuse to believe it? The answer is not due to any deficiency in the gospel itself. The gospel is not a distant, inaccessible, and undiscernible message. It has been preached openly to the world (Rom. 10:6-8; Eph. 3:3-5). The answer lies in the heart of the hearer. Isaiah wrote of the dull hearts, heavy ears, and closed eyes of Israel (Isa. 6:9-10). Jesus applied the prophet’s words to His generation (Matt. 13:13-15; 15:7-9). Christ also taught parables that illustrated hard hearts that prevent the gospel’s penetration and saving power (Matt. 13:18-19). Do not marvel when the truth of the gospel is rejected, scorned, and denounced. The problem is not the word of salvation; it is the solution (Rom. 1:16). Honest and good hearts receive the word of God, “keep it and bear fruit with patience” (Luke 8:15).