Just as everyone is not fit to reprove (Galatians 6:1), not every one is fit to be reproved (Matthew 7:6). It is not only permissible, but even commanded, that we minister to the wicked. Jesus himself was called the friend of sinners. And yet, Christ clearly instructed his disciples not to preach the gospel to those who were obstinate after the gospel had already been preached to them. Our evangelistic efforts should not be wasted on those who blaspheme the gospel and persecute those who preach it. Instead, we are commanded to turn our efforts towards others (Acts 13:41).