The Gospel Is for Both the "Good" and the "Bad"... Whoever Accepts the Invitation

Then he said to his servants, 'The wedding is ready, but those who were invited were not worthy. Therefore go into the highways, and as many as you find, invite to the wedding.' So those servants went out into the highways and gathered together all whom they found, both bad and good. And the wedding hall was filled with guests. Matt 22:8-10

We often think that "bad" people are the unworthy ones, but really the unworthy ones are the ones who were originally invited to the wedding, but rejected the invitation. This represents Israel, God's chosen people, who rejected the gospel. So God sent out His invitation to "as many as you can find." "Both good and bad." It's not about whether you're good or bad. It's whether or not you accept the invitation that has been extended freely to all.

The parable then continues, saying that a wedding guest was found who didn't have on a wedding garment. He was cast out "into outer darkness." The wedding garment represents righteousness. So how do we become clothed in righteousness? Israel had (zealously) tried to pursue it through their law-keeping, but they did not attain it. (See Rom 10:2-3). It's something that can only be received by grace through faith. Again, it's not about your good or bad works. It's about receiving the gift.