In the middle of his glorious, theological introduction to his gospel, the Apostle John introduces John the Baptist whom he calls “a witness” who came “to testify about the Light.”
“He came as a witness, to testify about the Light, so that all might believe through him” (John 1:7).
What a privilege to be called a witness of the Light, the Word who is God. The last words of Christ before he left this world was that we would be witnesses for him (Acts 1:8). In a very real sense, we are witnesses all the time. Our lives are always proclaiming something about us. And we want to be positive witnesses with our lives. Spurgeon notes,
Dear friends, if you and I know our real destiny, and are the servants of God, we are sent that men might, through us, believe in Jesus. John was a special witness; but we ought all to be witnesses to complete the chain of testimony. Every Christian man should reckon that he is sent from God to bear witness to the great Light, that, through him, men might believe.
Gospel Meditations 