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Theology & Dogma

Homoousios (Consubstantial)

Homoousios (Consubstantial), by Michael Damaskinos, 1591
Michael Damaskinos, 1591 Public domain

Greek term meaning 'of one substance/essence.' Affirmed at Nicaea I (325) to declare the Son is of the same essence as the Father: not a created being (contra Arianism). Central term of the Nicene Creed.

Sources

  • First Ecumenical Council, Nicaea (325 AD) the Acts, NPNF
  • St. Athanasius, Against the Arians NPNF

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