The Christian doctrine of the Trinity (Latin: Trinitas, lit. ‘triad’, from Latin: trinus “threefold”) holds that God is one God, but three coeternal consubstantial persons or hypostases —the Father, the Son (Jesus Christ), and the Holy Spirit—as “one God in three Divine persons”. The three persons are distinct, yet are one “substance, essence or nature” (homoousios). In this context, a “nature” is what one is, whereas a “person” is who one is. The subset of Christianity that accepts this doctrine is collectively known as Trinitarianism, while the subset that does not is referred to as nontrinitarian. Trinitarianism contrasts with positions such as Binitarianism (one deity in two persons) and Monarchianism (no plurality of persons within God), of which Modalistic Monarchianism (one deity revealed in three modes) and Unitarianism (one deity in one person) are subsets.