1. The Ario-maniacs, as it appears, having once made up their minds to transgress and revolt from the Truth, are strenuous in appropriating the words of Scripture, ‘When the impious cometh into a depth of evils, he despiseth;’ for refutation does not stop them, nor perplexity abash them; but, as having ‘a whore’s forehead,’ they ‘refuse to be ashamed’ before all men in their irreligion. For whereas the passages which they alleged, ‘The Lord created me,’ and ‘Made better than the Angels,’ and ‘First-born,’ and ‘Faithful to Him that made Him’ have a right sense, and inculcate religiousness towards Christ, so it is that these men still, as if bedewed with the serpent’s poison, not seeing what they ought to see, nor understanding what they read, as if in vomit from the depth of their irreligious heart, have next proceeded to disparage our Lord’s words, ‘I in the Father and the Father in Me;’ saying, ‘How can the One be contained in the Other and the Other in the One?’ or ‘How at all can the Father who is the greater be contained in the Son who is the less?’ or ‘What wonder, if the Son is in the Father,’ considering it is written even of us, ‘In Him we live and move and have our being?’ And this state of mind is consistent with their perverseness, who think God to be material, and understand not what is ‘True Father’ and ‘True Son,’ nor ‘Light Invisible’ and ‘Eternal,’ and Its ‘Radiance Invisible,’ nor ‘Invisible Subsistence,’ and ‘Immaterial Expression’ and ‘Immaterial Image.’ For did they know, they would not dishonour and ridicule the Lord of glory, nor interpreting things immaterial after a material manner, pervert good words. It were sufficient indeed, on hearing only words which are the Lord’s, at once to believe, since the faith of simplicity is better than an elaborate process of persuasion; but since they have endeavoured to profane even this passage to their own heresy, it becomes necessary to expose their perverseness and to shew the mind of the truth, at least for the security of the faithful. For when it is said, ‘I in the Father and the Father in Me,’ They are not therefore, as these suppose, discharged into Each Other, filling the One the Other, as in the case of empty vessels, so that the Son fills the emptiness of the Father and the Father that of the Son, and Each of Them by Himself is not complete and perfect (for this is proper to bodies, and therefore the mere assertion of it is full of irreligion), for the Father is full and perfect, and the Son is the Fulness of Godhead. Nor again, as God, by coming into the Saints, strengthens them, thus is He also in the Son. For He is Himself the Father’s Power and Wisdom, and by partaking of Him things originate are sanctified in the Spirit; but the Son Himself is not Son by participation, but is the Father’s own Offspring. Nor again is the Son in the Father, in the sense of the passage, ‘In Him we live and move and have our being;’ for, He as being from the Fount of the Father is the Life, in which all things are both quickened and consist; for the Life does not live in life, else it would not be Life, but rather He gives life to all things.