If you call yourself a Christian then you are a missionary. We are called by Christ to share the gospel, whether that be to the nations, our city, our family, etc. We must tend our own heart to make sure that we are healthy ambassadors. Most, if not all of us, have had to deal with tough situations in life. Situations that can leave wounds that may not be fully healed. We can only minister Christ's healing love to the measure by which we have received it ourselves. For many of us, the first thing we must do is seek and ask Jesus for healing in our own hearts.