The most obvious way is by never making it clear that evangelism among the unchurched is one of the missions of the church for which all believers have responsibility. A second way is by allowing ambiguity with respect to definitions of who is a Christian and who is not. There won't be any evangelism if there is no clear theology of conversion. Finally, the failure of the clergy to train people in the task of evangelism is a clear withholding of permission. Evangelism is not something the church does because it needs new members.
Evangelism is what the church does because it is the church.
And it does it in obedience to the command of Jesus following the example of the God who sent His own Son into the world. Mr. Bob Hiett is a lay person at the Church of Christ our Lord, a mission church in Woodbridge, Virginia.