The model described in Colossians 4:2-6 of ministry to those outside the church is very simple: pray, walk, and talk.
The Parable of the Banquet illustrates the various responses to the generous invitation of the King.
Sooner or later every kingdom that opposes God will be “all gone,” but there is a kingdom that will not pass away.
After God used Philip to save many Samaritans, he sent him to evangelize one who had come from the ends of the Earth.