The Holy and Inspired Scriptures are sufficient of themselves for the preaching of the Truth.
Athanasius of AlexandriaSimilarly, anyone who wishes to understand the mind of the sacred writers must first cleanse his own life, and approach the saints by copying their deeds.
Athanasius of AlexandriaWhile [the Arians], like men sprung from a dunghill, truly "spoke from the earth" [Jn. 3:31], the bishops [of Nicea], not having invented their phrases for themselves, but having testimony from their fathers, wrote as they did. For ancient bishops, of the great Rome and our city [i.e., Alexandria, Egypt, where Athanasius was bishop], some 130 years ago, wrote and censured those who said that the Son was a creature and not consubstantial with the Father.
Athanasius of Alexandria