His elaborate account of degrees and differences in 'works' and 'energies' within the Trinity is absurd
Can any one dare to speak of the divine and supreme Being in such a way that a less degree of honour in comparison is proved by the argument. “That all,” says the evangelist, “may honour the Son, as they honour the Father.” This utterance (and such an utterance is a law to us) makes a law of this equality in honour: yet this man annuls both the law and its Giver, and apportions to the One more, to the Other less of honour, by some occult method for measuring its extra abundance which he has discovered. By the custom of mankind the differences of worth are the measure of the amount of honour which each in authority receives; so that inferiors do not approach the lower magistracies in the same guise exactly as they do the sovereign, and the greater or less display of fear or reverence on their part indicates the greater or the less worshipfulness in the objects of it: in fact we may discover, in this disposition of inferiors, who are the specially honourable; when, for instance, we see some one feared beyond his neighbours, or the recipient of more reverence than the rest. But in the case of the divine nature, because every perfection in the way of goodness is connoted with the very name of God, we cannot discover, at all events as we look at it, any ground for degrees of honour. Where there is no greater and smaller in power, or glory, or wisdom, or love, or of any other imaginable good whatever, but the good which the Son has is the Father's also, and all that is the Father's is seen in the Son, what possible state of mind can induce us to show the more reverence in the case of the Father? If we think of royal power and worth the Son is King: if of a judge, 'all judgment is committed to the Son:' if of the magnificent office of Creation, 'all things were made by Him:' if of the Author of our life, we know the True Life came down as far as our nature: if of our being taken out of darkness, we know He is the True Light, who weans us from darkness: if wisdom is precious to any, Christ is God's power and Wisdom.
Our very souls, then, being disposed so naturally and in proportion to their capacity, and yet so miraculously, to recognize so many and great wonders in Christ, what further excess of honour is left us to pay exclusively to the Father, as inappropriate to the Son? Human reverence of the Deity, looked at in its plainest meaning, is nothing else but an attitude of love towards Him, and a confession of the perfections in Him: and I think that the precept 'so ought the Son to be honoured as the Father,' is enjoined by the Word in place of love. For the Law commands that we pay to God this fitting honour by loving Him with all our heart and strength and here is the equivalent of that love, in that the Word as Lawgiver thus says, that the Son ought to be honoured as the Father.
It was this kind of honour that the great David fully paid, when he confessed to the Lord in a prelude of his psalmody that he loved the Lord, and told all the reasons for his love, calling Him his “rock” and “fortress,” and “refuge,” and “deliverer,” and “God-helper,” and “hope,” and “buckler,” and “horn of salvation,” and “protector.” If the Only-begotten Son is not all these to mankind, let the excess of honour be reduced to this extent as this heresy dictates: but if we have always believed Him to be, and to be entitled to, all this and even more, and to be equal in every operation and conception of the good to the majesty of the Father's goodness, how can it be pronounced consistent, either not to love such a character, or to slight it while we love it? No one can say that we ought to love Him with all our heart and strength, but to honour Him only with half. If, then, the Son is to be honoured with the whole heart in rendering to Him all our love, by what device can anything superior to His honour be discovered, when such a measure of honour is paid Him in the coin of love as our whole heart is capable of? Vainly, therefore, in the case of Beings essentially honourable, will any one dogmatize about a superior honour, and by comparison suggest an inferior honour.
Again; only in the case of the creation is it true to speak of 'priority.' The sequence of works was there displayed in the order of the days; and the heavens may be said to have preceded by so much the making of man, and that interval may be measured by the interval of days. But in the divine nature, which transcends all idea of time and surpasses all reach of thought, to talk of a “prior” and a “later” in the honours of time is a privilege only of this new-fangled philosophy. In short he who declares the Father to be 'prior' to the subsistence of the Son declares nothing short of this, viz., that the Son is later than the things made by the Son (if at least it is true to say that all the ages, and all duration of time was created after the Son, and by the Son).
Source: Against Eunomius (New Advent)