When I first heard The Electrics' song "Party Goin' On Upstairs" on a bargain bin CD, the expression "RSVP" kept running through my head.  Some Christians, and some non-Christians, imply that Jesus places a large blockade in front of heaven's gate.  For them, the concept of a narrow way means that the path is hidden and the savior's calling is cryptic.  Actually, Jesus is quite clear about the obvious response he expects to his invitation.

Different Drummer: The Electrics