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.
As a christian, we can be a witness to others when they are seeing in us the power of the Holy Spirit. This is by not just attending church service every Sunday, nor having a complete attendance or good works. It is by having a change “from the inside” that reflects our “outside”. Having that Shine that comes from God, the distinction of being a born-again Christian compared from the world. A real love for God and His Word and like never before.