Only Begotten

The Greek word monogenes (traditionally translated 'only begotten' in KJV and related versions, or 'one and only' in modern versions) appears five times in the Gospel of John and First Epistle of John (John 1:14, 18; 3:16, 18; 1 John 4:9) and refers to Jesus's unique relationship to the Father. It also appears in Hebrews 11:17 of Isaac as Abraham's 'one and only son' and in Luke 7:12; 8:42; 9:38 of single children. The word's etymology is debated: the traditional view derived it from mono- (only) + gennao (to beget), yielding 'only begotten'; modern scholars more commonly derive it from mono- + genos (kind, type), yielding 'unique' or 'one of a kind.'

ISBE notes that the theological weight of monogenes in the Johannine context emphasizes the uniqueness and incomparability of Christ's relationship to the Father rather than a specific mode of generation. The term distinguishes the Son from all other 'children of God' — who are made sons by adoption and regeneration — and affirms a unique, eternal, essential relationship between Father and Son that is the basis of the Son's capacity to reveal and save. John 1:18 identifies the monogenes as existing 'in the bosom of the Father' — a spatial metaphor for intimate fellowship and mutual knowledge — and as the one who 'makes known' the unseen Father. The Nicene Creed's phrase 'only begotten Son of God, begotten of the Father before all worlds, God of God, Light of Light, Very God of Very God, begotten not made' reflects the patristic-conciliar interpretation of monogenes as expressing the eternal generation of the Son within the Godhead.