4 But these teachers of a new Christ, who deny to Him all that is His, preach another Lord Christ as well as another God the Father. The One is not the Begetter but the Creator, the Other not begotten, but created. Christ is therefore not very God, because He is not God by birth, and faith cannot recognise a Father in God, because there is no generation to constitute Him Father. They glorify God the Father indeed, as is His right and due, when they predicate of Him a nature unapproachable, invisible, inviolable, ineffable, and infinite, endued with omniscience and omnipotence, instinct with love, moving in all and permeating all, immanent and transcendent, sentient in all sentient existence.
But when they proceed to ascribe to Him the unique glory of being alone good, alone omnipotent, alone immortal, who does not feel that this pious praise aims to exclude the Lord Jesus Christ from the blessedness, which by the reservation 'alone' is restricted to the glory of God? Does it not leave Christ in sinfulness and weakness and death, while the Father reigns in solitary perfection? Does it not deny in Christ a natural origin from God the Father, in the fear lest He should be thought to inherit by a birth, which bestows upon the Begotten the same virtue of nature as the Begetter, a blessedness natural to God the Father alone?
Source: On the Trinity (New Advent)