Concerning the church’s adoption of the pagan concept of the Trinity, the New Catholic Encyclopedia says: “The formulation ‘ one God in three Persons ’ was not solidly established, certainly not fully assimilated into Christian life and its profession of faith, prior to the end of the 4th century.
„ New Catholic Encyclopedia ” ütleb paganliku kolmainuõpetuse kohta, mille kirik omaks võttis: „Formuleering„ üks Jumal kolmes Isikus ” kinnitas kanda ning sulas täielikult kristlikku ellu ja usutunnistusse alles 4. sajandi lõpus.