If you have received Christ, you are a member of the family of God. You are a citizen of God’s Kingdom and you are God’s ambassador.
An ambassador is a representative for an important person, like a king. An ambassador lives in a foreign land, but still receives his orders from his King back home. As His Ambassador, Jesus sends you into a “foreign land” (the world around you) to tell others about the Kingdom of God.
We live in the world and get our instructions from Jesus. We do not adopt the ways of the “foreign” world. We are “in the world, but not of the world.”