The Christian without a missionary heart is an anomaly. The missionary heart will be seen in all kinds of ways: in prayers for the lost, in making sure our behaviour offends noone, in making gospel conversations with friends (at dinner parties!), and in making every effort to save some. We are slaves without rights, even though we are free (cf. 2 For 4:5; Php 2:7). The Trellis and the Vine by Colin Marshall and Tony Payne, pg.52.