Eusebius’s letter to Euphration, which is mentioned just after, expresses this more distinctly—‘If they coexist, how shall the Father be Father and the Son Son? or how the One first, the Other second? and the One ingenerate and the other generate?’ Acta Conc. 7. p. 301. The phrase τὰ πρός τι Bull well explains to refer to the Catholic truth that the Father or Son being named; the Other is therein implied without naming. Defens. F. N. iii. 9. §4. Hence Arius, in his Letter to Eusebius, complains that Alexander says, ἀεὶ ὁ θεός, ἀεὶ ὁ υἱ& 231·ς ἅμα πατήρ, ἅμα υἱ& 231·ς. Theod. H. E. i. 4.