Rufinus: God the Father

"That God then is the Father of His only Son our Lord is to be believed, not discussed; for it is not lawful for a servant to dispute about the nativity of his lord. The Father has borne witness from heaven, saying, “This is My beloved Son, in Whom I am well pleased: hear Him.” The Father says that He is His Son and bids us hear Him. The Son says, “He who sees Me sees the Father also,” and “I and the Father are one,” and “I came forth from God and have come into the world.” Where is the man who can thrust himself as a disputant between these words of Father and Son, who can divide the Godhead, separate its volition, break asunder the substance, cut the spirit in parts, and deny that what the Truth speaks is true? God then is a true Father as the Father of the Truth, not begetting extrinsically, but generating the Son from that which Himself is; that is, as the All-wise He generates Wisdom, as the Just Justice, as the Everlasting the Everlasting, as the Immortal Immortality, as the Invisible the Invisible; because He is Light, He generates Brightness, because He is Mind, He generates the Word."

~Rufinus (344–410 A.D.): Commentary on the Apostles' Creed, 4.

Holy Family and God the Father, by Johann Karl Loth.
Oil on canvas, 1681; San Silvestro, Venice.