Trinitarianism - The ancient Nicene theologians argued that everything the Trinity does is done by Father, Son, and Spirit working in unity with one will. The three persons of the Trinity always work inseparably, for their work is always the work of the one God. The Son's will cannot be different from the Father's because it is the Father's.

The doctrine as stated is, in fact, correctly reported classical Nicene-Cappadocian Trinitarianism, not a spreadsheet caricature to be corrected — the honest response is to explain why it does not collapse the persons into one another. Nicene orthodoxy (formalized at the Council of Nicaea, 325, refined and confirmed at Constantinople, 381) affirms one divine *ousia* (essence/nature) subsisting as three distinct *hypostaseis* (persons): Father, Son, and Holy Spirit. The Cappadocian fathers — Basil of Caesarea, Gregory of Nazianzus, and Gregory of Nyssa — supplied the precise technical vocabulary that let the church say 'one What, three Whos': *ousia* answers 'what is God,' *hypostasis* answers 'who.' Because will (like power, knowledge, and goodness) is a property of *nature*, and there is exactly one divine nature, there is, strictly, one divine will in the sense of one faculty of willing shared, undivided, by all three persons (this is why the axiom *opera Trinitatis ad extra sunt indivisa* — 'the external works of the Trinity are undivided' — holds: creation, providence, and the sending of the Son and Spirit are all acts of the one God, not competing projects of three separate agents). But the persons remain *really distinct* — not by having different natures or different wills-as-faculties, but by their distinct relations of origin within the one nature: the Father is unbegotten, the Son is eternally begotten of the Father, the Spirit eternally proceeds. These relations of origin are not accidental add-ons but constitute the persons as who they distinctly are, while every one of them is, without remainder, fully the one God. So 'the Son's will cannot be different from the Father's because it is the Father's' correctly describes unity of nature/faculty, and does not erase personal distinction, which is grounded not in willing different things but in being really distinct relational subjects of the one divine life and will.

Nicene Trinitarianism is the solution that alone satisfies the full range of relevant biblical data simultaneously: (1) strict monotheism texts (Deut 6:4; Isa 45:5) — preserved because there is exactly one divine *ousia*; (2) texts where the Father is God (John 6:27; 1 Cor 8:6) and (3) texts where the Son is God (John 1:1; John 20:28; Col 1:15-20) — both preserved because both are fully the one divine nature, not two gods or a demoted second god; and (4) texts depicting real, simultaneous personal distinction and interpersonal address — the Son praying to the Father (John 17), the Father's voice from heaven at the Son's baptism while the Spirit descends and the Son stands in the water (Matt 3:16-17), the Son sending the Spirit from the Father (John 15:26) — preserved because the persons are really distinct relational subjects, not one subject wearing sequential masks. No rival account preserves all four categories of data at once; each alternative (see the Arianism and Modalism records below) is forced to sacrifice one category to save another.