What is up with Christians preaching to Christians?

Is the WWC (world wide church) really growing?, do we Christians really believe the gospel ? or do we do need to hear it just one more time this week...or perhaps once a day like a pill that keeps us level until our next pill. Is this Christian thing about reading what other Christians have to say about God and Jesus, listing to preachers and looking for the next inspiring thing to distract us from feeling guilty about not doing the thing we think we should be...but not really being sure what that thing is...so we just end up going to another church meeting to try and figure it all out. I don't know about you, but i don't see too many non-Christians going to church these days... What's up with that?