The Importance of the Subject. The Ariansaffect Scripture language, but their doctrine new, as well as unscriptural. Statement of the Catholic doctrine, that the Son is proper to the Father's substance, and eternal. Restatement of Arianismin contrast, that He is a creature with a beginning: the controversy comes to this issue, whether one whom we are to believein as God, can be so in name only, and is merely a creature. What pretence then for being indifferent in the controversy? The Ariansrely on state patronage, and dare not avow their tenets
10 Which of the two theologies sets forth our Lord Jesus Christ as God and Son of the Father, this which you vomited forth, or that which we have spoken and maintain from the Scriptures? If the Saviour be not God, nor Word, nor Son, you shall have leave to say what you will, and so shall the Gentiles, and the present Jews. But if He be Word of the Father and true Son, and God from God, and 'over all blessed for ever,' is it not becoming to obliterate and blot out those other phrases and that Arian Thalia, as but a pattern of evil, a store of all irreligion, into which, whoso falls, 'knows not that giants perish with her, and reaches the depths of Hades?'
This they know themselves, and in their craft they conceal it, not having the courage to speak out, but uttering something else. For if they speak, a condemnation will follow; and if they be suspected, proofs from Scripture will be cast at them from every side. Wherefore, in their craft, as children of this world, after feeding their so-called lamp from the wild olive, and fearing lest it should soon be quenched (for it is said, 'the light of the wicked shall be put out,') they hide it under the bushel of their hypocrisy, and make a different profession, and boast of patronage of friends and authority of Constantius, that what with their hypocrisy and their professions, those who come to them may be kept from seeing how foul their heresy is.
Is it not detestable even in this, that it dares not speak out, but is kept hidden by its own friends, and fostered as serpents are? For from what sources have they got together these words? Or from whom have they received what they venture to say? Not any one man can they specify who has supplied it. For who is there in all mankind, Greek or Barbarian, who ventures to rank among creatures One whom he confesses the while to be God and says, that He was not till He was made? Or who is there, who to the God in whom he has put faith, refuses to give credit, when He says, 'This is My beloved Son,' on the pretence that He is not a Son, but a creature?
Rather, such madness would rouse an universal indignation. Nor does Scripture afford them any pretext; for it has been often shown, and it shall be shown now, that their doctrine is alien to the divine oracles. Therefore, since all that remains is to say that from the devil came their mania (for of such opinions he alone is sower), proceed we to resist him— for with him is our real conflict, and they are but instruments—that, the Lord aiding us, and the enemy, as he is wont, being overcome with arguments, they may be put to shame, when they see him without resource who sowed this heresy in them, and may learn, though late, that, as being Arians, they are not Christians.
Source: Four Discourses Against the Arians (New Advent)