Because the early Christians were accused falsely of all sorts of outrageous behavior, Peter urged his readers in I Peter 2:11-25 to be especially careful to live such honorable lives that even their enemies would end up glorifying God. This calling was especially difficult, because they often found themselves in unfair situations that they were powerless to change, in which they suffered unjustly. Amazingly, God called them and calls us to endure unjust suffering and gave us the highest motivation for doing so: Christ already endured unjust suffering for us.
The model described in Colossians 4:2-6 of ministry to those outside the church is very simple: pray, walk, and talk.
The Parable of the Banquet illustrates the various responses to the generous invitation of the King.
The same joy that the first disciples experienced upon seeing Jesus again is available to us.