The earliest patristic evidence for church governance is consistently episcopal: a single bishop presiding over presbyters and deacons, with authority derived from apostolic appointment. Ignatius of Antioch (107 AD) ties the bishop's singular authority directly to church unity and sacramental validity; Hippolytus details episcopal oversight in liturgy and clerical discipline; and Cyprian argues that heresies arise precisely when "the one church and the one episcopate are deserted." The New Testament uses presbyteroi and episkopoi more fluidly, but the corpus the system retrieves — covering the second and third centuries — shows no evidence of presbyterian equality or congregational independence as normative models. By the mid-third century episcopal governance was universal in mainstream Christianity.
"There is one flesh of our Lord Jesus Christ, and one cup to show forth the unity of His blood; one altar; as there is one bishop, along with the presbytery and deacons" — the earliest and most insistent patristic advocacy for the single-bishop model as the condition of ecclesial unity.
Heresies exist because "the common commission first entrusted to Peter is contemned, and the one church and the one episcopate are deserted" — bishops hold decisive authority over baptism, discipline, and heresy; schism begins when presbyters act outside episcopal unity.
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