While it’s true that no intellectual argument could ever substitute for the act of sovereign grace necessary for sinners to come to their senses, in Paul’s mind that didn’t rule out debate. And according to Paul’s custom, he went to them, and for three Sabbaths reasoned with them from the Scriptures, explaining and giving evidence that the Christ had to suffer and rise again from the dead. . . . And some of them were persuaded. (Acts 17:2 – 4, [emphasis added]) You might also be able to think of examples from your own life where taking a thoughtful approach with someone made a big difference in his response, maybe even a decisive difference. Simply put, you can argue someone into the kingdom. It happens all the time. But when arguments are effective, they are not working in a vacuum. — Greg Koukl (from, Sharing Your Faith with Atheists Doesn’t Have to Be Scary)