Rev. VanOverloop is a missionary pastor of the Protestant Reformed Churches, in Northwest Chicago, Illinois. The church of Jesus Christ has the mandate to preach the gospel to every creature (Mark 16:15). This calling is fulfilled by the instituted church through its officebearers. But this does not leave the individual church members sitting on their hands. They too have responsibilities in this regard. The “mission” efforts of the individual members fall into two categories of witnessing: general and specific. In general, every believer has a responsibility to maintain the spiritual health of the local congregation of which he is a...