Important as they are, location and an aesthetic building are not the only keys to the growth of these churches. Another key is found in evangelism, which is the stimulus for rapid growth. It is the gospel method of enlarging outreach and bringing new life in Christ to the masses.

In addition to personal evangelism, the Encounter congregations implement regular evangelistic outreaches aimed at capitalizing on evangelistic momentum. Those who were saved at one outreach bring their friends, relatives, and acquaintances to the next. As a result, momentum is gained and church attendance literally explodes.

This principle is another reason for the required construction and development of large church facilities. Church facilities become evangelistic centers that must be large enough to conduct these intensive evangelistic campaigns.