A discussion over the weekend with dear friends brought this up. At what point do we consider that there is sufficient agreement to work with others outside of our denomination in evangelism? Some seem to believe that we should only work with others from our particular denomination; some believe that as long as both (or all) parties agree on the salvational issues of Christianity (Jesus as Messiah, virgin birth, etc) then they can work together. I'm not including the ecumenical movement since I'm pretty sure nobody on this board will tend that way. What verses can be used to guide this position?