Eastern Catholic Churches affirm Matthew 28:19 as establishing the essential form of Christian baptism in the Trinitarian name. Baptism in the name of the Father, the Son, and the Holy Spirit is required for valid Christian initiation. Eastern Catholic practice follows this apostolic formula precisely, and the Trinitarian invocation is non-negotiable. The passage provides the apostolic foundation for baptismal practice, which has been maintained unbroken in Eastern Catholic tradition and understood as essential to valid sacramental administration. This is consistent with the universal Catholic understanding of baptism while honoring Eastern patristic theology and liturgical practice.