Thus, the apostles' adventure began as a gathering of persons who open to one another reciprocally. A direct knowledge of the Teacher began for the disciples. They saw where he lived and began to know him. They would not have to be heralds of an idea, but witnesses of a person. Before being sent to evangelize, they would have to "be" with Jesus (cf. Mark 3:14), establishing a personal relationship with him. With this foundation, evangelization is no more than a proclamation of what has been experienced and an invitation to enter into the mystery of communion with Christ (cf. 1 John 13).