5. This, then, is the foundation of our faith—to know that the Son of God is begotten; if He be not begotten, neither is He the Son. Nor yet is it sufficient to call Him Son, unless you shall also distinguish Him as the Only-begotten Son. If He is a creature, He is not God; if He is not God, He is not the Life; if He is not the Life, then is He not the Truth.