repentance should be preached

Luke 24:36-53 (again)

v47

And that repentance and remission of sins should be preached in his name among all nations, beginning at Jerusalem.

This teaches that repentance is one of the things that we're supposed to preach in Jesus' name... But repentance in what way?

I think that we should preach for people who don't know Jesus to repent in their hearts from their unbelief, so they can be saved by believing in the Lord Jesus Christ. I think we should preach for believers to turn from what unbelief in Him they might still have. I also think we should preach for believers to repent from wrong-doing, so they can walk with the Lord in a way that's worthy of the salvation we've received.

Of course, it would be great if people who don't know Jesus would turn from sin too. However, telling unbelievers to stop sinning is not the gospel. We can't really stop without His help. Even if we could, it wouldn't do us any good because we can't save ourselves. The most important thing we need is to believe in Him. Only by believing in Him can we be saved in the first place, and only by believing in Him can we really repent from our sins.