“But those who are led by the Spirit of truth have no need to learn these things of me, for the words long since spoken by the Saviour yet sound in our ears, ‘No one knoweth who the Father is but the Son, and no one knoweth who the Son is but the Father.’ We have learnt that the Son is immutable and unchangeable, all-sufficient and perfect, like the Father, lacking only His “unbegotten.” He is the exact and precisely similar image of His Father. For it is clear that the image fully contains everything by which the greater likeness exists, as the Lord taught us when He said, ‘My Father is greater than I.’ And in accordance with this we believe that the Son always existed of the Father; for he is the brightness of His glory, and the express image of His Father’s Person.” But let no one be led by the word ‘always’ to imagine that the Son is unbegotten, as is thought by some who have their intellects blinded: for to say that He was, that He has always been, and that before all ages, is not to say that He is unbegotten.