The Athanasian Creed, formulated a few hundred years after the death of Jesus, defined the Trinity this way: “The Father is God: the Son is God: and the Holy Ghost is God.
Athanasiose usutunnistuses, mis formuleeriti mõnisada aastat pärast Jeesuse surma, defineeriti aga kolmainsust sel moel: „Jumal on Isa, Jumal on Poeg, Jumal on Püha Vaim.