Here is a good read palmcrazy,
When Jesus Christ sent out his disciples, he instructed them: "As you go,preach,saying, 'The Kingdom of the heavens has drawn near.'" (Matt.10:7) And in his prophetic command to true Christians who would be living during the conclusion of the system of things, he said: "This good news of the kingdom will be preached in all the inhabited earth for a witness."(Matt. 24:14) What did that mean?
It did not mean that they were to build churches, ring a bell, and wait for a congregation to assemble to hear them give a sermon once a week. The Greek verb here rendered "preach" (ke`ry'so) means, basically, "make proclamation as a herald." The idea is not delivering sermons to a closed group of disciples but, rather, making open, public declaration.
Jesus himself set the example as to how it was to be done. Would you like more examples of this?