Jesus said, “But you will receive power when the Holy Spirit comes on you; and you will be my witnesses in Jerusalem, and in all Judea and Samaria, and to the ends of the earth.” (Acts 1:8 NIV)
Our witness for Christ is never complete if it touches only individual lives… We are called to go into the world with a whole-life witness. In other words, our witness should transform not only the lives of individuals but also the world in which we live. In this way our witness becomes an expression of the Kingdom of God, coming on earth as it is already fulfilled in heaven.
Sometimes individual Christians and churches tend to emphasize either personal witness on the one hand or social witness on the other, but whole-life evangelism binds both together in a life-transforming whole.
-- James A. Harnish in “A Disciple’s Path: Deepening Your Relationship with Christ and the Church”