The story of Zacchaeus shows us how a true faith is revealed through transformation and repentance.  It also shows us how Jesus exemplifies to us a true missionary by specifically going to Zacchaeus and saving him.  We should all have a specific mission to reach one person who Christ has put in our area of influence.  We are all missionaries who either stay locally to reach those here while also supporting others who go to the foreign mission field, or we can go to where people have never heard of the Gospel of Jesus Christ.