In the beginning, Christianity was simply Gospel. Ecclesiastical organization was not the cause, but the effect of life. Churches were constituted by the spontaneous association of believers. Individuals and families, drawn toward each other by their common trust in Jesus the Christ, and their common interest in the good news concerning the kingdom of God, became a community united, not by external bonds, but by the vital force of distinctive ideas and principles. New affections became the bond of a new brotherhood, and the new brotherhood, with its mutual duties and united responsibilities, became an organized society. The ecclesiastical polity of the apostles was simple — a living growth, not an artificial construction.
– Leonard Bacon, The Genesis of The New England Churches (1874), 17.