Acts 13:5-14:21 provides three more important principles about missions. Why do we share these with those who are not missionaries? So that we can understand missions from a biblical perspective, and can pray for and support our missionaries biblically .

The primary responsibility of the missionary is to “preach the gospel” as a part of planting churches. (As important as humanitarian work may be, that is not the primary objective of Christian missions.)
The fact that not all members of the team were the preachers affirms the fact that there is a need for support personnel. Not all are preachers and the non-preaching members of the team are as important to the mission as the preachers.
The fact that the team was a great distance from the home church and was, therefore, unable to be in constant communication, instructs us that missionaries on the field, while responsible and accountable to their sending church, must be “field led.” It is impossible for the sending church to direct every aspect of the missionary enterprise. The Holy Spirit will guide and direct the missionary while on the field as to the daily details of the work. This is another reason why missionaries must be mature Christians whose relationship with the Lord and ability to hear and follow His leading must be without question.