Jesus was sending His disciples on their first mission without Him. He had given them the message to preach and the power to heal. He seemed confident that they knew their job and how to do it, but there was one area of concern – the people to whom they were going. There would be some people, some homes, perhaps some entire villages who would refuse them entry.
Jesus tells us to shake the dust from our feet and move onward. As with the disciples, Jesus gives us the message to be proclaimed and is confident that we know our task and how to do it.