"Then Jesus went around teaching from village to village." NIV translation
We see that Jesus did not stay there and try to force them to believe in Him. Instead, He moved on to other villages and many times we, as Christians, need to do the same. It seems that many today will stay in the same place doing the same thing "for Jesus" but there is no fruit produced from their labor. Many will also go so far as to criticize a Christian who moves on to more fertile soil and productive work. We must remember that the plant is judged by the crop it produces not by the amount of its growth.
"Calling the Twelve to him, he sent them out two by two and gave them authority over evil spirits." NIV translation
Jesus sent the apostles out in groups of two and gave them the authority to demonstrate His authority and power. We might ask why he sent them in groups of two instead of alone or as one big group. We are reminded that, throughout the Bible, the number two is associated with the number of legal witnesses required to make something be accepted as truth.
"These were his instructions: 'Take nothing for the journey except a staff - no bread, no bag, no money in your belts. Wear sandals but not an extra tunic. Whenever you enter a house, stay there until you leave that town. And if any place will not welcome you or listen to you, shake the dust off your feet when you leave, as a testimony against them.'" NIV translation
Jesus' instructions for the apostles were specific but have been misunderstood by many. They were going to nearby villages and were not to settle there but to complete their work so they would have not required a big suitcase of belongings. They were to proclaim the gospel and, if the people did not listen, their blood would be on their own heads.
This is a reminder for us that, like the apostles, our job is to clearly proclaim the good news of Jesus Christ but it is God's work to bring people to Himself. On the day of judgment, those that do not heed His call will not be able to say that they never heard.
"They went out and preached that people should repent. They drove out many demons and anointed many sick people with oil and healed them." NIV translation
We see, here, that they did preach the gospel and it was backed up by signs and wonders. Today, it seems that there is a kind of divorce between the two in parts of the world. There are some who preach the gospel but there is no display of God's power and very little happens in the lives of the people. There are others who get so caught up in signs and wonders that they do not clearly present the gospel and tell people how they can be saved. The preaching and the signs are designed by God to work together just as it did in the days of the apostles.