Many congregations have the misunderstanding that the assembly is primarily for the benefit of believers, not for unbelievers, and therefore orient their "service", particularly the sermon, to converting the unbeliever, making sure to offer an "Invitation" at the end of each sermon.
Yes, unbelievers may be in attendance,
and may be converted as a result of the activities in the assembly (1
Cor 14:24-25), but Jesus said, "Go ye into all the world and make
disciples," not "Go ye into all the church". The world is our mission
field for converting unbelievers; the church is our place for building
up & encouraging those who already believe (1 Cor 14:26b; Heb
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