The danger of having such willing volunteers is that we use them, exploit them and forget to train them. Then they burn out, their ministry is curtailed, and we find that we have failed to develop their Christian life and ministry potential. Instead of using our volunteers, we should consider how we can encourage them and help them grow in the knowledge and love of Christ, because service flows from Christian growth and not growth from service.
The ‘teaching’ that the disciples are to do reproduces what Jesus himself has done with them. He has been their ‘teacher’ (cf. Matt 12:38; 19:16; 22:16, 24, 36; 26:18), and as Jesus has taught them they have grown in knowledge and understanding. The disciples are now, in turn, to make new disciples by teaching them to obey everything commanded by their Master. This ‘making-disciples-by-teaching’ corresponds to preaching the gospel in the parallel mission mandate in Luke, where Jesus says “repentance and forgiveness of sins should be proclaimed in his name to all nations, beginning from Jerusalem” (Luke 24:47).
There are not two sorts of disciples — the inner core who really serve Jesus and his gospel, and the rest. To be a disciple is to be a slave of Christ and to confess his name openly before others: “So everyone who acknowledges me before men, I also will acknowledge before my Father who is in heaven, but whoever denies me before men, I also will deny before my Father who is in heaven” (Matt 10: