Your Church is Too Small

The vision Armstrong offers, however, perceives by exegesis that the unity of Christians, which Jesus prayed that the world might see, is neither unanimity nor uniformity nor union (as he neatly puts it) but loving cooperation in life and mission, starting from wherever we are at the moment and fertilized and energized by the creedal and devotional wisdom of the past.  Thus the internal unity of togetherness in Christ may become a credibility factor in the church's outreach, just as Jesus in John 17 prayed that it would.

Source: J.I. Packer  -  Forward from Your Church is Too Small, by John Armstrong, p. 11